Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back.. Plants certainly cannot run away, and they lack teeth and claws. But plants can 题目和参考答案——青夏教育精英家教网—

精英家教网 > 高中英语 > 题目详情

Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back.. Plants certainly cannot run away, and they lack teeth and claws. But plants can defend themselves by using both physical and chemical means.
Some plants have their own ways to keep animals away. For example, the leaves of the holly plant have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach.
Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal's teeth.
Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.
Many plants depend on both physical and chemical defenses. A certain plant in China, for
instance, has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液) A single experience with this kind of plant will teach an animal to stay away from it in the future.
小题1:The holly plant has more spines on the lower leaves because most animals________.

A．are not tall enough	B．like the lower leaves only
C．are not clever enough	D．can get the lower leaves easily

小题2:To defend themselves, oak trees use________.

A．chemical means	B．physical means
C．bitter chemicals	D．sandy materials

小题3:How does tobacco protect itself against an attack from a caterpillar?

A．Its leaves fight against the attack by physical means.

B．Its roots send a messenger to discourage the caterpillar.

C．Its roots increase the production of nicotine when it is attacked.

D．Its leaves produce poisonous sand to drive the caterpillar away.

小题4:What would be the best title for this passage?

A．Plants and Animals	B．How Plants Defend Themselves
C．Attacks and Defenses	D．How Animals Eat Plant Leaves

小题1:D
小题2:B
小题3:C
小题4:B

小题1:考查考生对因果关系的认定能力。文章第二段This is because the lower leaves are easier for most animals to reach.提供答案。
小题2:考查考生对短文中细节的识辨能力。答案在文章第三段。
小题3:考查考生对短文中细节的识辨能力。答案在文章第四段This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.
小题4:考查考生拟定标题的能力。文章第一段总领全文，介绍了植物是如何进行自我保护的。

练习册系列答案

年级	高中课程	年级	初中课程
高一	高一免费课程推荐！	初一	初一免费课程推荐！
高二	高二免费课程推荐！	初二	初二免费课程推荐！
高三	高三免费课程推荐！	初三	初三免费课程推荐！
更多初中、高中辅导课程推荐,点击进入>>

相关习题

科目：高中英语 来源：不详 题型：阅读理解

Methods of training animals have changed greatly in recent years. Zoo keepers have always had problems getting the animals to leave their cages in order for the cages to be cleaned, and also training them to move indoors when appropriate. Another problem was that many of the large animals became listless and bored. In the last twenty years, scientists have done research on dolphins and whales, training them to obey commands. The scientists found they could get animals to obey by rewarding them with food and affection when they responded correctly.?
Proper training allows the animals to receive the care they need. It was very difficult to get untrained animals, especially the larger ones, to stay still when they needed medical attention. Now they can be trained, on command, to remain still and even to allow blood samples to be taken and shots administered. All this is accomplished through positive reinforcement, without the use of any force. Affection training, as this process is called, has been used with great success on a wide variety of zoo animals. Animal behavior experts have taught zoo keepers to train bears, tigers, monkeys, and many other species to behave in a way that provides for better animal-keeper interaction. This training also keeps the animals from becoming bored and inactive.?
Although some people proclaim(谴责) that this training is inhumance and cruel to animals, results have shown that captive(猎获的)animals who previously were not doing well flourish under the new training procedures.?
小题1:The word “listless” means _______.

A．countless	B．obedient
C．inactive	D．mysterious?

小题2: Which of the following is valid conclusion based on this passage?

A．It is safe to pet any animal.　?

B．Many animals respond favorably to rewards and affection.?

C．Animals in the wild can be trained.?

D．Animals should not be kept in zoos.?

小题3:The writer's purpose is to _______.

A．persuade people not to feed animals in the zoo?

B．show how easy it is to train animals?

C．explain method of training animals through rewards?

D．criticize zoo keepers?

小题4:Which of the following is an opinion??

A．Zoo keepers had problems in getting animals to leave their cages.?

B．Training is cruel to animals.?

C．Animals obey commands if they are trained to do so.?

D．Many animals can be trained, on commands, to remain still.

查看答案和解析>>

科目：高中英语 来源：不详 题型：阅读理解

It is sometimes said that strange flying objects have been seen high up in the sky. People call these strange objects Unidentified Flying Objects (UFO). These UFOs caused a lot of interest. Some of the reports about them are difficult to believe. Some have been explained in scientific ways. Others have never been explained. Here is an account of UFOs from a report.
Dennis Burdens, who wrote an article, tells us that he once saw a UFO himself. He was having dinner one night with a friend near Tripoli, Libya, and after dinner the two men walked across a yard to his room to look at some papers. Burdens noticed that the moon looked strange that night.
“It wasn’t the moon ”, was the reply.
They watched the light and saw that it was moving. It seemed to be an object rather like a big plate. In some ways it looked like smoke with a light on it, but it wasn’t smoke because it didn’t change its shape. It was moving in a regular way. That is to say, it didn’t go suddenly faster or more slowly, and it didn’t go higher or lower. So the two men decided that there must be men in it.
After that, Burdens said that he felt eyes looking at him. He was being watched in the darkness.
When it was nearer, they noticed that the bottom parts were brighter than the top. The bottom was yellow and the top red. Then the object suddenly turned away and left Libya, moving very fast.
On a later day Burdens talked to other people about it, and he found some who had seen it. They all described it in the same way. Could they all be mistaken?
小题1: UFOs are _____.

A．flying high up in the sky	B．strange flying objects
C．difficult to believe	D．very interested

小题2: A UFO was seen one night _____.

A．when they were walking across a yard to Burdens’ room

B．while they were looking at the light

C．when Burdens noticed the moon appearing strange

D．while they were having dinner

小题3:The UFO moved _______.

A．regularly

B．in a changeable way

C．slowly

D．fast

小题4: The UFO looked like _____ .

A．smoke

B．a large plate

C．light

D．a jumping object

小题5:The UFO was seen ______ .

A．by Burdens and his friend	B．brighter in the darkness
C．by several people	D．to have a yellow bottom and a red top in the same way

查看答案和解析>>

科目：高中英语 来源：不详 题型：阅读理解

Sheep, like turkeys and ostriches, are not considered the cleverest animals. British scientists said last Wednesday human may have underestimated(低估) the woolly creatures. They could be much smarter than we think.
Researchers at the Babraham Institute in Cambridge, southern. England, have shown that animals have a good memory system and are extremely good at recognizing faces--which they think is a sure sign of intelligence.
Behavioral scientist Keith Kendrick and his friends trained 20 sheep to recognize and distinguish(区别) 25 pairs of sheep faces and used electrodes(电极) to measure their brain activity, which showed they could remember 50 faces for up to two years.
"If they can do that with faces, the fact is that they have to have reasonable intelligence, otherwise, what is the point of having a system for remembering anything else," Kendrick said in an interview.
So hours of seemingly mindless eating grass may not be so mindless after all.
Kendrick believes sheep got their reputation as dumb animals because they live in large groups and do not appear to have much ind
ividuality and are frightened of just about everything.
All animals, including humans, once they are frightened don't tend to show signs of intelligent action," he explained.
In research reported in the science journal Nature, Kendrick and his team showed that sheep, like humans, have a specialized system in the brain, which allows them to distinguish between many different faces that look extremely similar.
"The most important findings of the study is that they are able, both from a behavioral point of view and from looking at the way the brain is organized, to remember a large number of faces of individuals for a very long time," said Kendrick. "It is a very strange system. They are showing similar abilities in many ways to humans. "
小题1: From the first paragraph we can find that ______.

A．people used to think sheep are smarter than the other animals

B．people used to raise sheep in a wrong way

C．people don't consider sheep as clever animals

D．people have done a lot of research on sheep

小题2: From what Kendrick said in the interview we learn that ________.

A．scientists have learned a lot about sheep's intelligence

B．scientists have learned little about sheep's intelligence

C．scientists can't do anything more about sheep's memory

D．scientists don't have to research animals' memory

小题3: As is shown in the passage _________.

A．sheep are among the weak animals

B．it is not right for people to raise sheep in groups

C．when sheep eat grass in the fields their minds may be active

D．if people feel frightened, they may become more brave

小题4: When scientists found that sheep show similar abilities in many ways to humans they may think it _____.

A．worrying

B．moving

C．frightening

D．interesting

查看答案和解析>>

科目：高中英语 来源：不详 题型：阅读理解

Professor Barry Wellman of the University of Toronto in Canada has invented a term to describe the way many North Americans interact(互动)these days.The term is “networked individualism”.This concept is not easy to understand because the words seem to have opposite meanings.How can we be individuals(个体)and be networked at the same time?You need other people for networks.
Here is what Professor Wellman means.Before the invention of the Internet and e-mail,our social networks included live interactions with relatives,neighbors,and friends.Some of the interaction was by phone,but it was still voice to voice,person to person,in real time.
A recent research study by the Pew Internet and American Life Project showed that for a lot of people,electronic interaction through the computer has replaced this person-to-person interaction.However,a lot of people interviewed for the Pew study say that’s a good thing.Why?
In the past,many people were worried that the Internet isolated(孤立)us and caused us to spend too much time in the imaginary world of the computer.But the Pew study discovered that the opposite is true.The Internet connects us with more real people than expected—helpful people who can give advice on careers,medical problems,raising children,and choosing a school or college.About 60 million Americans told Pew that the Internet plays an important role in helping them make major life decisions.
Thanks to the computer,we are able to be alone and together with other people—at the same time!
小题1:The underlined phrase “networked individualism”probably means that by using computers people_______.

A．stick to their own ways no matter what other people say

B．have the rights and freedom to do things of their own interest

C．do things in their own ways and express opinions different from other people

D．are able to keep to themselves but at the same time reach out to other people

小题2:According to the Pew study,what do many people rely on to make major life decisions?

A．Networks.	B．Friends.
C．Phones.	D．Parents.

小题3:It can be inferred from the Pew study that_______.

A．people have been separated from each other by using computers

B．the Internet makes people waste a lot of time and feel very lonely

C．the Internet has become a tool for a new kind of social communication

D．a lot of people regard the person-toperson communication as good thing

小题4:Which would be the best title for this passage?

A．We’re Alone on the Internet.

B．We’re Communicating on the Internet.

C．We’re Alone Together on the Internet.

D．We’re in the Imaginary World of the Internet.

查看答案和解析>>

科目：高中英语 来源：不详 题型：阅读理解

Only about half of this year’s high school graduates have the reading skills they need to succeed in college, and even fewer are prepared for college-level science and math courses, according to a yearly report from ACT, which produces one of the nation’s leading college admissions tests.
The report, based on scores of the 2005 high school graduates who took the exam, some 1.2 million students in all, also found that fewer than one in four met the college-readiness benchmarks①in all four subjects tested: reading comprehension, English, math and science.
ACT sets its college-readiness benchmarks — including the reading comprehension benchmark, which is new this year—by correlating②earlier students’ ACT scores with grades they actually received as college freshmen. Based on that data, the benchmarks indicate the skill level at which a student has a 70 percent likelihood③ of earning a C or better, and a 50 percent chance of earning a B or better.
Among those who took the 2005 test, only 51 percent achieved the benchmark in reading, 26 percent in science, and 41 percent in math; the figure for English was 68 percent. Results from the new optional ACT writing test, which was not widely taken this year, were not included in the report.
About 40 percent of the nation’s 2005 high school graduates took the ACT, and the average overall score was unchanged from the year before. Minority students make up 27 percent of all ACT test takers. Besides, there are also other worrying trends in the ACT report as well, including a continuing decline in the percentage of students planning to major in engineering, computer science and education.
Notes:
① benchmark n. 基准
② correlate v. 联系
③ likelihood n. 可能性
1. The report from ACT mainly tells readers the problem that ______.
A. few minority students graduates took ACT
B. many who intend to go to college are not ready
C. the college-readiness benchmarks is high this year
D. the tests for some subjects are too difficult
2. According to the benchmarks in 2005, about how many students will not earn C?
A. 30 percent. B. 70 percent. C. 50 percent. D. 26 percent.
3. Which of the following pictures can correctly show the numbers of the students who achieve the benchmark in different subjects?
A.

4. Which of the followings can be found in the report from ACT in 2005?
A. The report about the writing test is very objective.
B. More boy students are not good at science and math.
C. The percentage of students majoring science declined.
D. The average score of 2005 ACT participants changed greatly.

查看答案和解析>>

科目：高中英语 来源：不详 题型：完形填空

From the earlier time it was well ___1___ to the Peruvians that when a cut ___2___ made in the thick skin of a ___3___ tree, a white liquid like milk came ___4___. From this fluid (流动的) a sticky ___5___ of rubber might be made. This rubber is ___6___ and wax-like when warm so that it is ___7___ to give any form.
The Peruvians ___8___ the discovery that it is very good for ___9___ out water. Then in the early ___10___ of the century they made overshoes to ___11___ their feet dry. Then a certain Mr Mackintosh ___12___ coats of cloth which were ___13___ with rubber. Today Mackintosh raincoats are still ___14___ after him.
But these first rubber shoes ___15___ raincoats were unpleasantly soft and sticky in ___16___. They were also stiff and very ___17___ in winter. They were like wax(蜡) although they ___18___ a bit stronger.
But the rubber ___19___ use today has been improved. It is ___20___ sticky but soft and elastic(弹性的) and strong enough for any season.
1. A. talked     B. heard C. seen    D. known
2. A. has B. was     C. may    D. will
3. A. rubber    B. apple C. orange       D. oak
4. A. from      B. through      C. out     D. up
5. A. raincoat B. shoes C. border D. mass
6. A. hard       B. fast     C. stubborn     D. soft
7. A. important      B. impossible C. possible      D. uncertain
8. A. made      B. found C. wrote D. neglected
9. A. finding   B. keeping      C. making      D. pouring
10. A. kind     B. part    C. sort     D. halves
11. A. clean    B. clear   C. keep   D. prevent
12. A. made    B. found C. appeared    D. gave
13. A. full      B. like     C. lined   D. applied
14. A. looked B. named C. made D. searched
15. A. or B. and     C. with    D. but
16. A. today    B. summer      C. winter D. rain
17. A. soft      B. sticky C. elastic D. cold
18. A. felt       B. made C. needed       D. produced
19. A. Mr Mackintosh    B. the Peruvians     C. we      D. is
20. A. also      B. always       C. neither       D. not

查看答案和解析>>

科目：高中英语 来源：不详 题型：阅读理解

When a group of children politely stop a conversation with you, saying: “We have to go to work now,” you’re left feeling surprised and certainly uneasy. After all, this is the 1990s and the idea of children working is just unthinkable. That is, until you are told that they are all pupils of stage schools, and that the “work” they go off to is to go on the stage in a theatre.
　　Stage schools often act as agencies（代理机构）to supply children for stage and television work. More worthy of the name “stage school” are those few places where children attend full time, with a training for the theatre and a general education.
　　A visit to such schools will leave you in no doubt that the children enjoy themselves. After all, what lively children wouldn’t settle for spending only half the day doing ordinary school work, and acting, singing or dancing their way through the other half of the day?
　Then of course there are times for the children to make a name and make a little money in some big shows. Some stage schools give their children too much professional work at such a young age. But the law is very tight on the amount they can do. Those under 13 are limited to 40 days in the year; those over 13 to 80 days.
　The schools themselves admit that not all children will be successful in the profession for which they are being trained. So what happens to those who don’t make it? While all the leading schools say they place great importance on children getting good study results, the facts seem to suggest this is not always the case.
　小题1:People would stop feeling uneasy when realizing that the children they’re talking to________.
　　

A．attend a stage school　　　　

B．are going to the theatre
　　

C．have got some work to do 　　

D．love singing and dancing

　　小题2: In the writer’s opinion, a good stage school should ________.
　　

A．produce star performers
　　

B．help pupils improve their study skills
　　

C．train pupils in language and performing arts
　　

D．provide a general education and stage training.

　小题3:“Professional work” as used in the text means ________.
　　

A．ordinary school work　　　　　

B．money-making performances
　　

C．stage training at school 　　

D．acting, singing or dancing after class

　小题4: Which of the following best describes how the writer feels about stage schools?
　　

A．He thinks highly of what they have to offer.　　　　
　　

B．He favours an early start in the training of performing arts.
　　

C．He feels uncomfortable about children putting on night shows.
　　

D．He doubts the standard of ordinary education they have reached.

查看答案和解析>>

科目：高中英语 来源：不详 题型：阅读理解

It is difficult for parents of nearly every family to teach their children to be responsible for housework, but with one of the following suggestions, you really can get your children to help at home.
If you give your children the impression that they_____________________, then they will regard themselves as unfit or unable persons. Unless children believe they can succeed, they will never become totally independent （独立）.
My daughter Carla’s fifth-grade teacher made every child in her class feel special. When students received less than a perfect test score, she would point out what they had mastered and declared firmly they could learn what they had missed.
You can use the same technique when you evaluate （评价）your child’s work at home. Don’t always scold and give lots of praise instead. Talk about what he has done right, not about what he hasn’t done. If your child completes a difficult task, reward him with a Sunday trip or a ball game with Dad.
Learning is a process （过程）of trying and failing and trying and succeeding. If you teach your children not to fear a mistake of failure, they will learn faster and achieve success at last.
1.What’s the best title of the passage?
2.Which sentence in the passage is the closest in meaning to the following one?
The process of learning is full of trying and failing ,and after trying again and again ,one will succeed.
3.Please fill in the blank in the passage with proper words or phrases to complete the sentence.(within ten words)
4.What do you think parents should do to educate their children well according to the passage?(within 30 words)
5.Translate the underlined sentence into Chinese.

查看答案和解析>>

同步练习册答案

练习册

高中

初中

小学