精英家教网 > 高中英语 > 题目详情

As they migrate(迁移), butterflies and moths(飞蛾) choose the winds they want to fly with, and they change their body positions if they start floating in the wrong direction. This new finding suggests that insects may employ some of the same methods that birds use for traveling long distances. Scientists have long thought that insects were simply at the mercy of the wind.

Fascinating as their skills of flight are, migrating behavior has been difficult to study in insects because many long distant trips happen thousands of feet above ground. Only recently have scientists developed technologies that can detect such little creatures at such great heights.

To their surprise, though, the insects weren’t passive but active travelers on the winds. In autumn, for example, most light winds blew from the east, but the insects somehow sought out ones that carried them south and they positioned themselves to navigate(导航) directly to their wintering homes.

Even in the spring, when most winds flowed northward, the insects didn’t always go with the flow. If breezes weren’t blowing in the exact direction they wanted to go, the insects changed their body positions to compensate(抵消). Many migrating birds do the same thing.

The study also found butterflies and moths actively flew within the air streams that pushed them along. By adding flight speeds to wind speeds, the scientists calculated that butterflies and moths can travel as fast as 100 kilometers an hour. The findings may have real-world applications.

With climate warming, migrating insects are growing in number. Knowing how and when these pests move could help when farmers decide when to spray their crops.

1.What’s the main idea of the text?

A. Insects migrate with the seasons

B. Wind helps insects greatly in migrating

C. insects have real direction

D. Scientists have trouble in observing insects

2.Scientists originally thought that .

A. insects always waited for their favorable winds

B. insects chose the winds they wanted to ride

C. insects were just blown about by the wind

D. insects positioned themselves in the winds

3.It is not easy to study the migrating behavior of the insects because .

A. the little creatures can fly very fast

B. their flight is long and high above ground

C. the wind’s direction is hard to foresee

D. they have no regular migrating courses

4.According to the passage, the findings can .

A. increase insects in number

B. instruct farmers when to spray

C. prevent climate warming

D. help protect insects

练习册系列答案
相关习题

科目:高中英语 来源:湖北省沙市2017届高考冲刺第九次考试英语试卷 题型:短文填空

Once upon a time, there was a man from the State of Chu who loved his sword very much. One day, he was sitting in a boat   preparing to cross a river1. he accidentally dropped his sword into the water. 2.  the ship moving fast on and the water running, the people on board reminded that he should go into the water to find his beloved sword back. The man felt in great  3. ( anxious) too. However, he turned a deaf ear to that and instead, he 4.   (immediate) took out a knife and made a notch(刻痕) on the side of the boat  5.   his dear sword fell. The people wondered why he did so. He said proudly the notch could help 6. (get) his sword back. Shortly after the 7.   (arrive) at the shore, he entered the water just beneath the notch he made. Though  8.  (spend) rather a long time, he returned empty-handed. Without doubt, he was laughed at in public and his story became 9.  well-known joke in China.

Today the idiom  10.  (relate) to the story is used to describe a person who stick to rigid rules without considering a changing environment or describes an action made pointless by changing circumstances.

查看答案和解析>>

科目:高中英语 来源:广东省广州市2017届英语高考冲刺题(一) 题型:短文改错

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(Λ),并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分。

Thirty years ago, my world almost fell apart. I had operation and was fired. In a few weeks, I saw an ad about a Spanish festival. Although I was very upset, and I decided to go. Here, I met a gentleman with who I chatted for hours. A few day later, I came home to found a letter at my door. It was from that friend. Inside the letter was a 1,000-dollar check to help me through his hard days. Sixteen years later, I met a family that bad needed help. I gave them enough money to get through. They called me their angel, but I told them I once had an angel, also.

查看答案和解析>>

科目:高中英语 来源:山西省2016-2017学年高二下学期第三次(5月)月考英语试卷 题型:短文改错

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误。错误仅涉及一个单词的增加、删除或修改。增加:在缺词处加一个漏字符号∧,并在其下面写出该加的单词。删除:把多余的单词用\划掉。修改:在错的单词下面画一横线,并在该单词下面写出修改后的单词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分。

The teenage year from 13 to 19 were the most difficult time for me. They were also the best and worse years in my life. At the first, I thought I knew everything but could make decisions by myself. Besides, my parents didn’t seem to think so. They always tell me what to do and how to do it. At one time, I even felt my parents couldn’t understand me so I hoped I could be freely from them. I showed them I was independent by wear strange clothes. Now I am leaving home for college. At last, I will be on their own, but I still want to have my parents to turn whenever I need help.

查看答案和解析>>

科目:高中英语 来源:山西省大同市2016-2017学年高二5月月考英语试卷 题型:书面表达

假设你是李华,一名高三学生,在网络上看到一所国外大学的招生( admission)信息,该大学对中国学生开设了30多个专业(major),你对此非常感兴趣,打算用英语撰写一份个人申请,主要内容包括:

1.想申请的专业;2.个人优势;3.进大学后的设想。

注意:

1.词数:100字左右;2.书信格式已给出;3.可适当增加细节,以使行文连贯。

Dear Sir or Madam,

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

____________________________________________________________________________________________

___________________________________________________________________

Yours Sincerely,

Li Hua

查看答案和解析>>

科目:高中英语 来源:安徽省六安市2016-2017学年高一下学期第二次段考英语试卷 题型:短文改错

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下短文。短文中共有10处错误,每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧),并在此符号下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线,并在该词下面写出修改后的词。

注意:1.每处错误及其修改均仅限一词;

2.只允许修改10处,多者(从第11处起)不计分。

It is known that some students cheat in exams.There are three reason.First of all,there are so many exams.Beside,the exams given are difficulty in some ways.Secondly,some students have to cheat in exams because of they are too lazy.The last reason is to please our parents and teachers.For some students,low marks brought them great pressure and make them depressing.In my opinion,cheating in exams are wrong.We should take active attitude to our studies,and try to get a mark what is true.

查看答案和解析>>

科目:高中英语 来源:吉林省2017届高三下学期第三次模拟考试英语试卷 题型:书面表达

假定你是某国际高中的学生会主席李华,你校将于本周五下午两点邀请2014届优秀毕业生刘明(现就读于Harvard大学物理系)重返母校,并在学校报告厅(auditorium)进行讲座,分享他的学习经历和大学生活。请你代表学生会写一份书面通知,邀请全校学生参加。

内容要点如下:

1.刘明简介;

2.讲座内容;

3.鼓励同学们积极参与。

注意:

1.词数100左右;

2.可适当加入细节,以使行文连贯;

3.通知的开头和结尾已经给出,不计入总词数。

Notice

Exciting news! _____________________________________________________________________________

_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

THE STUDENTS’ UNION

查看答案和解析>>

科目:高中英语 来源:辽宁省庄河市2016-2017学年高一下学期期中考试英语试卷 题型:阅读理解

That cold January night,I was growing sick of my life in San Francisco.There I was,walking home at one in the morning after a tiring practice at the theatre.With the opening night only a week away,I was still learning my lines.I was having trouble dealing with my part-time job at the bank and my acting at night at the same time.As I walked,I thought seriously about giving up both acting and San Francisco.City life had become too much for me.

As I walked down empty streets under tall buildings,I felt very small and cold.I began running,both to keep warm and to keep away from any possible robbers.Very few people were still out except a few sad-looking homeless people under blankets.

About a block from my apartment,I heard a sound behind me.I turned quickly,half expecting to see someone with a knife or a gun.The street was empty.All I saw was a shining streetlight.Still,the noise had made me nervous,so I started to run faster.Not until I reached my apartment building and unlocked the door did I realize what the noise had been.It had been my wallet falling to the sidewalk.

Suddenly I wasn’t cold or tired anymore.I ran out of the door and back to where I’d heard the noise.Although I searched the sidewalk anxiously for fifteen minutes,my wallet was nowhere to be found.

Just as I was about to give up the search,I heard the garbage truck pull up to the sidewalk next to me.When a voice called from the inside,"Alisa Camacho"I thought I was dreaming.How could this man know my name?The door opened,and out jumped a small red-haired man with an amused look in his eye."Is this what you’re looking for" he asked,holding up a small square shape.

It was nearly 3 a.m. by the time I got into bed.I wouldn’t get much sleep that night,but I had gotten my wallet back.I also had gotten back some enjoyment of city life.I realized that the city couldn’t be a bad place as long as people were willing to help each other.

1.From the first paragraph,we learn that the writer was busy______.

A. solving her problem at the bank

B. taking part in various city activities

C. learning acting in an evening school

D. preparing for the first night show

2.In the fifth paragraph,why did the writer say she was dreaming?

A. Someone offered to take her back home.

B. A red-haired man came to see her.

C. She heard someone call her name.

D. Her wallet was found in a garbage truck.

3.From the text,we can infer that the writer ________.

A. would stop working at night

B. would stay on in San Francisco

C. would make friends with cleaners

D. would give up her job at the bank

查看答案和解析>>

科目:高中英语 来源:四川省2016-2017学年高一下学期第二次月考(5月)英语试卷 题型:七选五

How to Survive High School

High school can be terrible phase if you get it all wrong. Find out how to survive high school with a few easy tips.

1. Be Yourself.

High school is a fun time to make new friends, meet new people, date and socialize. Make friends with all kinds of people and not just a group which you are comfortable with. Most peer pressure cases are because of the weak image created by freshmen. 1. Don’t give in to anyone’s wants.

2.2.

Choose your friends carefully and make sure you won’t get influenced by anyone. Socialize, but by judging who you can connect to. You will find friends, but stay away from the ones who don’t want to be your friends as a bad company is tempting, but the good one is true.

3. Be Optimistic.

There is nothing better than having a smile on your face whenever you can. 3. Don’t be afraid to make friends, don’t get aggressive or personal with anyone and treat others the way you want to be treated. Respect your teachers and classmates and try to be helpful if you want the same in return.

4. Be Confident.

When you believe in yourself, others believe in you. Talk, walk and address people confidently and this will create a strong image about you. 4. Be creative and unique and learn to set trends. Confidence is one quality you grow with, and people respect you for that.

5. Love High School.

5. Make the most out of it, and you will never get those moments back. Come up with frank ideas, get a detention, top your class, make the best friends, drink, go to prom, party, but just make as many memories as you can!

With these tips to survive high school, you will surely be proud of graduating as an all-round approaching adult.

A. And always wear your smile

B. Keep Good Company

C. Just be yourself and create a strong self-image

D. Practice positive thinking

E. Do your thing, and don’t imitate others

F. Fall in love with it

G. Study as hard as you can in your spare time

查看答案和解析>>

同步练习册答案