高中英语人教版2019必修3期末复习卷（七）有答案.docx
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1、高中英语人教版2019必修3期末复习卷（七）时间：60分钟 分值：100分第一部分阅读(共两节，满分40分)第一节(共8小题；每小题3分，满分24分)阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。APeople have different ways of dealing with a common cold. Some take over the counter medicines such as aspirin while others try popular home remedies(治疗) like herbal tea or chicken soup. Yet h
2、ere is the tough truth about the common cold: nothing really cures it.So why do people sometimes believe that their remedies work? According to James Taylor, professor at the University of Washington, colds usually go away on their own in about a week, improving a little each day after symptoms peak
3、, so its easy to believe its medicine rather than time that deserves the credit, USA Today reported.It still seems hard to believe that we can deal with more serious diseases yet are powerless against something so common as a cold. Recently, scientists came closer to figure out why. To understand it
4、, you first need to know how antiviral drugs work. They attack the virus by attaching to and changing the surface structures of the virus. To do that, the drug must fit and lock into the virus like the right piece of a jigsaw(拼图), which means scientists have to identify the virus and build a 3D mode
5、l to study its surface before they can design an antiviral drug that is effective enough.The two cold viruses that scientists had long known about were rhinovirus(鼻病毒) A and B. But they didnt find out about the existence of a third virus, rhinovirus C, until 2006. All three of them contribute to the
6、 common cold, but drugs that work well against rhinovirus A and B have little effect when used against rhinovirus C.This explains most of the previous failures of drug trials against rhinoviruses, study leader Professor Ann C. Palmenberg at the University of Wiscons in Madison, US, told Science Dail
7、y.Now, more than 10 years after the discovery of rhinovirus C, scientists have finally built a highly detailed 3D model of the virus, showing that the surface of the virus is, as expected, different from that of other cold viruses.With the model in hand, hopefully a real cure for a common cold is on
8、 its way. Soon, we may no longer have to waste our money on medicines that dont really work.1. What does the author think of popular remedies for a common cold?A. They are quite effective. B. They are slightly helpful.C. They actually have no effect. D. They still need to be improved.2. How do antiv
9、iral drugs work?A. By breaking up cold viruses directly.B. By changing the surface structures of the cold viruses.C. By preventing colds from developing into serious diseases.D. By absorbing different kinds of cold viruses at the same time.3. What can we infer from the passage?A. The surface of cold
10、 viruses looks quite similar.B Scientists have already found a cure for the common cold.C. Knowing the structure of cold viruses is the key to developing an effective cure.D. Scientists were not aware of the existence of rhinovirus C until recently.4. What is the best title for this passage?A. Drugs
11、 against cold viruses B. Helpful home remediesC.Research on cold viruses D. No current cure for common coldBIt happens countless times a day. A flowers bright color and the smell of sweet nectar (花蜜) attract a bee. The bee stops by for a quick taste and small grains of pollen (the powder produced by
12、 a flower) stick to its body. The bee then travels to another flower of the same type and leaves the pollen as it has another meal. This is an example of animal pollination (授粉) a process extremely important to plant reproduction.Its not only plants that depend on animal pollination humans do too. W
13、orldwide, nearly a thousand plants that we grow for food, spices, clothing fibers, and medicine depend on it. If pollination suddenly stopped, we would have no apples, tomatoes, coffee, and many other goods.This important process is carried out by more than 200,000 different animal species known as
14、pollinators. Flies and beetles - the original pollinators - date back 130 million years to the first flowering plants. Birds, butterflies, and ants also do their part. Even nonflying mammals help out: monkeys tear open flowers with their hands, accidentally spreading pollen into the air and onto the
15、ir fur.Pollinators are therefore important, but they are also at risk. Climate change, habitat loss, and invasive predators (入侵捕食者) all threaten them. The United States, for example, has lost over 50 percent of its honeybees over the past ten years. A serious threat facing bees is colony collapse di
16、sorder, when worker bees mysteriously disappear from their colony. Scientists are still trying to identify its cause.There is a quote attributed to Einstein that if bees ever disappeared, man would only have four years left to live. Whether thats true or not does not really matter, says wildlife pho
17、tographer Louie Schwartzberg: the key point is that there is a real danger. “The healthiest food we need to eat,” he says, “would disappear without pollinating plants. Its pretty serious.”5. What might be left on flower B, as is shown in the picture?A Nectar. B. Pollen. C. Leaves D. Fur.6. What can
18、be inferred from the text?A. Pollination means a lot to fruits and grains.B. Nearly a thousand plants depend on pollination.C. Monkeys are the only nonflying mammal pollinators.D. There are more than 20,000 different species of pollinators.7. What threat are honeybees faced with?A. Climate change. B
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