[单选,材料题] As to the greenhouse effect, the author________

根据下列材料，请回答下面的题目：
There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic. At present, we realize that although these are the areaswith the worst air pollution, the problem is literally worldwide. On several occasions over the pastdecade, a heavy cloud of air pollution has covered the east of the United States and brought healthwarnings in rural areas away from any major concentration of manufacturing and automobile traffic.In fact, the very climate of the entire earth may be infected by air pollution. Some scientists considerthat the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels(coal and oil) is creating a "greenhouse effect" conserving heat reflected from the earth and raisingthe world’s average temperature. If this view is correct and the world’s temperature is raised only afew degrees, much of the polar ice cap will melt and cities such as New York, Boston, Miami, andNew Orleans will be in water.
Another view, less widely held, is that increasing particular matter in the atmosphere is blockingsunlight and lowering the earth’s temperature--a result that would be equally disastrous. A drop ofjust a few degrees could create something close to a new ice age, and would make agriculture difficultor impossible in many of our top farming areas. Today we do not know for sure that either of theseconditions will happen (though one recent government report drafted by experts in the field concludedthat the greenhouse effect is very possible). Perhaps, if we are lucky enough, the two tendencies willoffset each other and the world’s temperature will stay about the same as it is now. Driven by eco-nomic profit, people neglect the damage on our environment caused by the "advanced civilization".Maybe the air pollution is the price the human beings have to pay for their development. But is it really worthwhile?

As pointed out at the beginning of the passage, people used to think that air pollution________

A . shares the same view with the scientists
B . is uncertain of its occurrence
C . rejects it as being ungrounded
D . thinks that it will destroy the world soon

should。 would。 could。 must。根据材料,回答{TSE}题: In Britain, people have different attitudes to the police. Most people generally ______26______themand the job they do-although there are certain people who do not believe that the police______ 27______have the power that do. What does a policeman actually do? It is not______28______job to describe. After all, a policeman hasa number of jobs in ______ 29______ . In Britain, he might be in the Traffic Police and ______ 30 ______most of histime______ 31 ______up and down main roads and motorways. A traffic policeman has to keep the traffic ______32______and help when there is an accident. A policeman has to help keep the ______ 33______ , too. If there is a fight or some other disturbance,we ______ 34 ______the police to come and restore order. And they often have to ______ 35 ______situation at greatrisk to their own ______ 36______. We expect the police to solve crimes, of course, so an ordinary policeman,______ 37 ______ he is not a detective, will often have to help ______ 38 ______and arrest criminals.And ______ 39 ______ do we call when there is an emergency-an air crash, a ______ 40 ______ , a road accident,or a robbery? We call the police.41a policeman has to be42to face any unpleasant e-mergency that may happen in the ______ 43 ______world. The police do an absolutely necessary job, they do it ______ 44 ______ well and I support them, but I do not envy policemen, I do not think that I could ______ 45 ______do the job of a policeman.{TS} dislike。 join。 appreciate。 admire。 How old was the baby when he learned to say that word correctly? About 18 months.。 About 21 months.。 About 24 months.。 About 12 months,。 When a person sneezes, we say" God bless you" because __________ it’s a tradition。 the person is possessed of an evil spirit。 the person is ill。 God will bless those who sneeze。 When the girl began to sneeze continuously,________ a lot of people offered their advice。 she was taken to Johns Hopkins Hospital。 she was given a treatment found in ancient superstition。 many doctors treated her in different ways。 As to the greenhouse effect, the author________

参考答案：

● 参考解析

B【解析】第一段最后一句“If this view is correct…”表明作者只是引用这种现象，并不确定其正确性。

当前位置：外语考试＞公共英语

[单选,材料题] As to the greenhouse effect, the author________

相关题目: