2015职称英语理工类A级考试真题（含答案）
第二篇 Face Masks May Not Protect from Super-Flu
IF a super-flu strikes, face masks may not protect you. Whether widespread use of masks will help, or harm, during the next worldwide flu outbreak is a question that researchers are studying furiously. No results have come from their mask research yet. However, the government says people should consider wearing them in certain situations anyway, just in case.
But it’s a question the public keeps asking while the government are making preparations for the next flu pandemic. So the Centers for Disease Control and Prevention (CDC) came up with preliminary guidelines. “We don’t want people wearing them everywhere，” said the CDC. “The overall recommendation really is to avoid exposure.55
When that’s not possible, the guidelines say to consider wearing a simple surgical mask if you are in
one of the three following situations. First, you’re healthy and can’t avoid going to a crowded place. Second t you，re sick and think you may have close contact with the healthy, such as a family member checking on you. Third, you live with someone who，s sick and thus might be in the early stages of infection, but still need to go out.
Influenza pandemics can strike when the easy-to-mutate flu virus shifts to a sto*ain that people never have experienced. Scientists cannot predict when the next pandemic will arrive, although concern is rising that the Asian bird flu might trigger one if it starts spreading easily from person to person.
During the flu pandemic, you should protect yourself. Avoid crowds，and avoid close contact with the sick unless you must care for someone. Why aren’t masks added to this self-protection list? Because they can help trap virus-laden droplets flying through the air with a cough or sneeze. Simple surgical masks only filter the larger droplets. Besides, the CDC is afraid masks may create a false sense of security. Perhaps someone who should have stayed home would don an ill-fitting mask and hop on the subway instead.
Nor does flu only spread through the air. Say someone covers a sneeze with his or her hand, then touches a doorknob or subway pole. If you touch that spot next and then put germy hands on your nose or mouth, you’ve been exposed. It’s harder to rub your nose while wearing a mask and so your face may get pretty sweaty under masks. You reach under to wipe that sweat，and may transfer germs caught on the outside of the mask straight to the nose. These are the problems face masks may create for their users.
Whether people should or should not use face masks still remains a question. The general public has to wait patiently for the results of the mask research scientists are still doing.
36.What is the passage mainly about?
A. Widespread use of face masks.
B. Possibility of a worldwide flu outbreak
C.New discoveries of a face mask research.
D.Effectiveness of wearing face masks
37.The CDC suggests that people
A.stay alone when being sick
B.wear face masks when going to a crowded place.
C.wear face masks wherever possible.
D.remain at home if living with someone who，s sick.
38.The word ’'that" in Paragraph 3 refers to
A.making preparations.
B.avoiding exposure
C.coming up with guidelines.
D.wearing face masks everywhere.
39.Which of the following statements is true?
A.Scientists warn the next flu is coming soon.
B.Asian bird flu is spreading easily from person to person.
C.Masks protect people because they keep viruses away.
D.Masks are not effective if a flu strikes.
40.One of the concerns the CDC has is that
A.masks may give people a wrong assumption of being safe.
B.the sick may not wear masks and go out.
C.flu virus may spread via public transportation.
D.healthy people may not know how to protect themselves.
第三篇 What’s killing the Bats
First it was bees. Now it is bats. Biologists in America are working hard to discover the cause of the mysterious deaths of tens of thousands of bats in the northeastern part of the country. Most of the bats affected are the common little brown bats (Myotis lucifiigus,) but other species，such as the long-eared bat, the small-footed hat, the eastern pipistrelle, and the Indiana bat have also been affected. In some caves, more than 90 percent of the bat populations have died.
One possibility is disease. A white fungus (真菌)known as fusarium has been found on the noses of both living and dead bats. However，scientists don't know. If the fungus is the primary cause of death，a secondary cause of death, or not a cause at all, but the result of some other conditions.
Another possible cause is a lack of food. For example, bats typically eat a large number of moths (蛾)， and in some states such as New York, the number of moths has been declining in recent years. If bats can’t eat enough food, they starve to death.
Still other scientists believe that global wanning is to blame. Warmer temperatures in recent years have been waking up hibernating (冬目民)bats earlier than usual. If bats break their hibernation at the wrong time, they might not find their expected food sources. The weather might also turn cold again and weaken or kill the bats.
Scientists might not agree on the causes of the bat die-off, but they do agree on the consequences. Bats are an important predator of mosquitoes; a single brown bat can eat 1,000 or more insects in an hour. They also eat beetles and other insects that damage plant crops. If there aren't enough bats, damage will be great from the insects they eat While bats live a long time for their size — the little brown bat can live for more than 30 years — a female bat has only one baby per year，so bat populations grow slowly. Many bat species in the United States are already protected or endangered.
How can you help? Do not disturb sleeping or nesting bats. If you discover bate that seem to be sick or that are dead, contact your local Fish& Wildlife Department with the details. However，be careful not to touch the animals.
41.What is the main idea of this passage?
A.All species of bats in North America are dying.
B.Scientists already know the cause of the deaths of bats
C.The bat deaths are a serious problem.
D.There are many possible causes of the deaths of bats.
42.What does the first sentence in Paragraph 1 mean?
A.Bees have been dying mysteriously.
B.The first article on the website is about bees.
C.Bees usually die before bats
D.It was bees that caused the deaths of bats.
43.The word “pipistrelle" in Paragraph 1 refers to
A.a kind of fungus.
B.an area in the U.S.
C.a special cave.
D.a kind of bat.
44.The "moths" in Paragraph 3 are taken as an example of
A.diseases that kill bats.
B.Insects that bats eat.
C.animals that have diseases.
D.bat species that are starving to death.
45.What is the purpose of the last paragraph?
A.To get people to stop killing bats.
B.To hire workers for the Fish & Wildlife Department.
C.To ask people not to touch dead bats.
D.To tell the public how to help bats.