题目列表(包括答案和解析)
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C
A blow-fly was looking for an ideal place like rotting meat to lay her eggs so that when her little babies were born, they could feed on the meat.
As she turned a corner in the grassland, she smelt something that smells like rotten meat in the air! With a great joy she landed on it and laid her eggs. She was happy that her children would have enough food to eat.
But the fly did not know she had made a great mistake. What she had sat upon was not meat but a flower, which smells badly. It is called a carrion flower. So, when the blow-fly’s eggs hatched and the little maggots(蛆)came out, they had nothing to eat. They died of starvation.
The carrion flower is one of the many flowers which send out dirty smells to attract flies. The Rafflesia stinks like rotting meat, while the tropical Lords and Ladies flower gives out a smell like rotting fish.
They do it for a special reason. These plants cannot move from their place. But it is important for the male cell of one plant to get in touch with the female cell of another plant. Once that is done, the seed of the plant will bloom and give birth to another plant.
The plant uses its stink to attract flies. As soon as the blow-fly sits on the follower, it is captured by the flower with strong hair. When the hair falls, the fly is free to fly- but it takes some pollen(花粉) with it. And goes and sits on another plant. The male cell of one plant meets the female cell of the other. The seed gets new life.
64. Why did the fly land on something smelly?
A. She was too careless before her bearing. B. She liked the particular smell very much
C. She hoped to find some food for her babies. D. She couldn’t find a better place for delivery.
65. The little maggots finally died because_________.
A. they were born too weak B. they lacked food available
C. carrion flower were poisonous D. their mother didn’t take care of them
66. Flowers like carrion flower and Rafflesia naturally smell terrible so that_________.
A. they need insects to spread their pollen B. they succeed in producing more seeds
C. their seeds can be carried to other places D. they can manage to absorb more nutrients
67. What is the best title of the text?
A. Dirty Tricks B. Smelly Plants C. A strange Flower D. Secrets of Nature.
Humankind has tried to improve its standard of living since the very beginning of civilization. Back then, as well as today, providing food and security was the basic task for a person. However, nowadays the range of required goods has expanded significantly. People feel the need for not only some primary things, such as a piece of bread and a roof over their heads, but also for various facilities and luxuries. Providing humanity with these things is connected to the use of natural resources, which requires energy. In turn, the common sources of energy we use today cause pollution, so economic growth is almost inevitably associated with environmental damage.
Economic growth is the increase in numbers of goods and services produced over time by an economy, and it's calculated in terms of real Gross Domestic Product (GDP). Before growth is calculated, inflation(通货膨胀) is adjusted in order to take into account its misleading effect on the price of goods and services. Economic growth can also be explained as the increase in expected output, which results from an increase in actual output, or total demand.
There are certain aspects of economic growth which affect the environment. The first of these is the fact that in order to produce more goods and products, at a faster rate, the construction of large industrial plants is required. These plants produce a lot of waste, leading to the pollution of water and the atmosphere, which may cause negative long- term health effects to nearby populations of animals, or people. They also lead to global warming.
Industrial manufacturing leads to the constantly increasing energy consumption. The traditional energy sources, which are commonly used nowadays, are considered to be the greatest polluters to the environment. There also exist so-called eco-friendly sources of energy. They are sometimes preferred but replacing the traditional sources with them also requires time, during which people have to make some sacrifices to support these undertakings.
In order to produce economically practical energy, a sometimes significant transformation of the natural site is often inevitable. This is expensive and, has harmful effects on the environment. Application of wind energy would Block airflows' natural speed, which is the reason for their decrease in strength, after crossing the windmill. Consequently, the pressure balance that is brought about by this current will be affected, and it is important to remember that the environment and weather conditions are directly affected by atmospheric pressure.
For these reasons, bringing about economic growth without resulting in any environmental damage is impossible.
1.What does the passage mainly talk about?
A.Pollution caused by plant construction
B.Effects of windmills on the environment
C.Economic growth and human civilization
D.Economic growth and environmental damage
2.According to the passage, the author holds the opinion that ____.
A.economic growth should be calculated in terms of GDP
B.use of natural resources causes no damage to the environment
C.industrial manufacturing may cause damage to the environment
D.a windmill is a perfect way to produce economically practical energy
3.Which of the following shows the structure of the passage?
CP (Central Point) P (Point) Sp (Sub-point次要点) C (Conclusion)
You are here: Experts > Science > Science/Nature for Kids > Science for Kids > Life Science for teens<> |
Expert: Science Adviser - <>3/21/2011 |
QUESTION: Dear Marie, Do you have some good suggestions of biology: plant, animal, human science experiments that would work well with teenagers? Scientific methods must go with the experiments. Thanks! < Donna ANSWER: Dear Donna, Marie is not online and I’ll help you instead of him. There are a lot of little things that can be done, but do you mean lab experiment or statistical analysis, etc.? Let us know what can be suitable for you teens, and we will do our best to send you some experiments to do. Best, Gloria |
Expert: Science Adviser - 3/23/2011 |
QUESTION: Dear Gloria, I need lab experiments. The teenage students and I will use data from these experiments to make charts, graphs, tables, etc. and to provide claims and evidence to explain more about the results. Thank you very much. Donna ANSWER: Hi there, Your best and easiest way is to do some chemistry experiments. Those are very easy and most probably you can do it in the lab and have charts, etc. for you. I do not have any particular one at the top of my head because I do cancer research and it is a bit more difficult than research for teenagers. I think you can look through these and see if you find something useful for you. http://www.siraze.net/chemistry/sezennur/experiments.htm If not, get back to me and Marie, and we’ll look more. The good thing about this site is that it has the procedures that you can follow. Good luck, Gloria |
1.How many Science Advisers are there working for this website?
A. Only one. B. At least two. C. About three. D. Over five.
2.According to Donna, she and the teenage students need ___________.
A. experiments in the lab B. statistical analysis
C. chemistry experiments D. charts and evidence
3.Who is this text for?
A. Teenagers. B. Teachers. C. Parents. D. Experts.
4. According to Gloria, Donna and the teenage students should __________.
A. turn to others for help B. do cancer researches
C. look through a website D. tell who will be helped
第二节 完形填空(共20小题;每小题1.5分,满分30分)
阅读下面短文,掌握其大意,然后从36—55各题所给的A、B、C、D四个选项中,选出最佳选项。
One evening after dinner,Mr.and Mrs.Bond called a family meeting.“We’ve had to make a 36 decision,” Mr.Bond announced.“You see,your mother has been offered a post as co-director of a TV station in Chicago. 37 ,the station is not here.After 38 long and hard about it,we’ve 39 that the right decision is to move to Chicago.”
Marc looked 40 ,while his sister Rachel breathlessly started asking when they’d be moving.“It’s surprising but exciting!” she said.Marc simply said,“I can’t leave my 41 . I’d rather stay here and live with Tommy Lyons !”
The Bonds hoped that by the time they moved to Chicago in August,Marc would grow more 42 the idea of leaving.However,he showed no 43 of accepting the decision,refusing to 44 his belongings.
45 the morning of their move,Marc was nowhere to be found.His parents called Tommy Lyons’ house,but Mrs.Lyons said she hadn’t seen Marc.Mrs.Bond became increasingly 46 while her husband felt angry with their son for behaving so 47 .
What they didn’t know was that Marc had started to walk over to Tommy’s house with a faint idea of 48 in Lyons’ attic (阁楼) for a few days.But as he walked along,all the 49 landscape of his neighbourhood 50 him of the things he and his family had done together : the green fence he and his mother had painted;the trees he and his sister used to 51 while playing hide-and-seek;the park 52 he and his father often took walks together.How much would these 53 without his family,who made them special in the first place ? Marc didn’t take the 54 to answer that question but instead,he hurried back to his house, 55 if the were any boxes the right size to hold his record collection.
36.A.different B.quick C.wise D.final
37.A.Besides B.However C.Therefore D.Even though
38.A.thinking B.quarrelling C.complaining D.arguing
39.A.known B.recognized C.concluded D.insisted
40.A.shocked B.puzzled C.disappointed D.excited
41.A.classmates B.friends C.neighbours D.parents
42.A.delighted at B.pleased with C.used to D.worried about
43.A.ways B.signs C.interests D.hopes
44.A.pack B.collect C.tie D.pile
45.A.Before B.In C.On D.During
46.A.anxious B.angry C.frightened D.miserable
47.A.rudely B.irregularly C.irresponsibly D.naughtily
48.A.hiding B.staying C.sleeping D.living
49.A.beautiful B.familiar C.splendid D.modern
50.A.recalled B.remembered C.warned D.reminded
51.A.plant B.water C.climb D.hide
52.A.which B.where C.that D.what
53.A.cost B.value C.mean D.measure
54.A.time B.courage C.strength D.patience
55.A.looking B.wondering C.asking D.expecting
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