问题 单项选择题

温室效应将引起全球气温上升,导致气候异常、海平面上升、生态恶化。引起温室效应的最主要的气体是______。

A.氧化亚氮
B.二氧化碳
C.臭氧
D.甲烷

答案

参考答案:B

解析: 本题测查军转干考生公共知识(科学)素养。温室效应,又称“花房效应”。大气能使太阳短波辐射到达地面,但地表向外放出的长波热辐射线却被大气吸收,这样就使地表与低层大气温度增高,因其作用类似于栽培农作物的温室,故名温室效应。引起“温室效应”的气体称为“温室气体”,水汽(H2O)、二氧化碳(CO2)、氧化亚氮(N2O)、甲烷(CH3)、臭氧(O3)等是地球大气中主要的温室气体。温室效应主要是由于现代化工业社会过多燃烧煤炭、石油和天然气,大量排放尾气,这些燃料燃烧后放出大量的二氧化碳气体进入大气造成的。

完形填空

Andy was still traveling in Spain when he realized he had to confirm(确认) his flight home with the airline company(航空公司). He was visiting Spain in order to __36   his Spanish. When he was speaking to people__37 he had no __38 understanding what they said. __39 , when he was speaking on the phone, he __40  had a problem. Andy__41  the airline. And the clerk confirmed that his plane was leaving at nine o'clock three days from that day. She__42  told Andy to be at the airport two hours __43  in order to check in his luggage and get a seat.

Since he was__44  in three days, Andy didn't __45 any time. He visited as many places as he could. He thought that it would probably be a while before he had enough money again. He wished he could __46   and spend a year in Spain.

Too __47 , the final day arrived. Andy left early for the airport to arrive two hours before take-off. He hated to __48  . He went to the clerk to __49 his ticket. The clerk looked at the ticket with__50 . “Why, sir, but your flight was at nine o'clock in the morning, and __51   it is eight in the evening.”“ But I confirmed my flight,” __52 Andy. “Will I have to pay for another ticket?”

“No,sir. However, the next flight out will be three days from now.”

Andy's __53of shock turned to one of __54 as he realized that now he could continue his__55 .

36.A. prepare         B. improve         C. enjoy         D. learn 

37.A. slowly          B. in public       C. in person     D. carefully

38.A. difficulty      B. idea           C. mistake       D. interest 

39.A. Instead         B. Therefore       C. Meanwhile     D. However

40.A. even            B. just            C. still         D. seldom

41.A. called          B. liked           C. trusted       D. asked

42.A. again          B. also            C. only          D. once

43.A. before          B. earlier         C. later         D. after

44.A. moving          B. returning       C. staying       D. leaving

45.A. take            B. have            C. lose          D. find 

46.A. wait            B. go home         C. stop          D. come back 

47.A. shortly         B. quickly         C. badly         D. early

48.A. speak           B. go              C. rush          D. delay

49.A. buy             B. present         C. order         D. provide

50.A. astonishment    B. patience        C. respect       D. delight

51.A. maybe           B. so              C. here          D. now

52.A. insisted        B. apologized      C. replied       D. demanded

53.A. experience      B. expression      C. look          D. face

54.A. pleasure        B. comfort         C. sadness       D. hopelessness

55.A. plan            B. flight          C. journey       D. vacation 

单项选择题