问题 问答题 简答题

简述脱除CO2的方法及其原理。

答案

参考答案:

(1)吸收法:用吸收装置:消石灰、碱溶液、乙醇胺、碳酸钾等与CO2发生化学反应,将CO2吸收掉。

(2)吸附法:分子筛、硅胶、活性炭等的多孔性及特殊结构,对CO2具有较强的吸附能力。

完形填空

第二卷   附加题

完形填空一。(共12小题;每小题1.5分,满分18分)

阅读下面短文,掌握其大意,然后从第66至第77小题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。.

It seems like everywhere a person goes there is at least one person with a cell phone to his ear. Even in places where cell phone usage is banned such as concert halls or movie theatres there is the   66    offender, or at least a few people using the text messaging feature on their phones.

Cell phone usage has exploded over the past decade and continues to rise. Nearly 200 million people in the United States have cell phones and there are   67   over one billion users worldwide. That means there are a lot of phones   68   their frequencies over the airwaves at any given time.

Concern has arisen over whether or not cell phone usage can harm a person’s health. Brain cancer rates in the United States have risen since cell phones were   69  , leading some people to wonder if cell phone usage is the reason for the   70  .

Some people say the biggest danger with cell phones isn’t from the either real or perceived potential to develop cancer, but from   71   while using the cell phone. How many of us have seen vehicles driving quite erratically(不稳定地)down the road. And we often see when we get near the vehicle the driver on a cell phone is   72   on a cell phone. It is a proven fact that a driver on a cell phone is   73   attentive and more likely to get in an accident. And, hands-free sets aren’t the answer that some people may believe. Yes, they   74   both hands for driving and prevent a person from getting a sore arm,  75   the driver’s mind is still   76   the conversation and therefore less attentive to what is   77   around him or her on the road.

66. A. busy                   B. always                     C. occasional         D. occasionally

67. A. well                   B. good                 C. better                D. best

68. A. delivering           B. carrying            C. taking               D. sending

69. A. allowed                     B. invented            C. introduced         D. bought

70. A. increase                     B. decline              C. improvement     D. rose

71. A. attention             B. attractive           C. careless             D. inattentiveness

72. A. using                 B. talking                     C. moving             D. handing

73. A. more                  B. less                   C. least                  D. fewer

74. A. hold up                     B. pick up             C. put up               D. free up

75. A. therefore             B. as                     C. but                   D. though

76. A. taken up             B. filled by            C. occupied with    D. picked up

77. A. happening to             B. going on           C. talking about     D. moving about

单项选择题

Almost every day we see something in the papers about the latest exciting developments in the space race. Photographs are regularly flashed to the earth from thousands and even millions of miles away. They are printed in our newspapers and shown on our television screens as a visible proof of the man’s newest achievements. The photographs neatly sum up the results of these massive efforts to ’ conquer space’ and at the same time they exposed the absurdity of the undertaking. All we can see is an indistinguishable blob that is supposed to represent a planet seen from several thousand miles away. We are going to end up with a little moon-dust and a few stones which will be put behind glass in some museum. (41)__________

(42)__________It is just an extension of the race for power on earth. Only the wealthiest nations can compete and they do so in the name of pure scientific research. But in reality, all they are interested in is power and prestige. They want to impress us, their spectators, with a magnificent show of strength. Man has played the power game ever since he appeared on earth. Now he is playing it as it has never been played before. The space race is just another aspect of the age-old argument that "might is right".

(43)__________But what has the space race done to relieve the suffering of the earth’s starving millions In what way has it raised the standard of living of any one of us As far as the layman is concerned, the practical results of all this expenditure of money and efforts are negligible. Thanks to space research, we can now see television pictures transmitted live halfway across the globe and the housewife can use non-stick frying pans in the kitchen. The whole thing becomes utterly absurd when you think that no matter what problems man overcomes, it is unlikely that he will ever be able to travel even to the nearest star.

(44)__________For the first time in his history, man has the overwhelming technological resources to combat human suffering, yet he squanders them on meaningless pursuits.

(45)__________Individuals with limited budgets usually get their priorities right; they provide themselves with necessities before trying to obtain luxuries. Why can’t great nations act in the same sensible way Let us put our house in order first and let space look after itself.

44()

A.An increasing number of people even begin to picture a space travel in recent years.

B.Poverty, hunger, disease and war are man’s greatest enemies and the world would be an infinitely better place if the powerful nations devoted half as much money and effort to these problems as they do to the space race.

C.The space race is not simply the objective search for knowledge though it is often made out to be.

D.On the other hand, people benefit dramatically from the development of science and technology.

E.This is hardly value for money when you think that our own earth can provide countless sights that are infinitely more exciting and spectacular.

F.We are often told that technological know-how, acquired in attempting to get us into orbit, will be utilized to make better on earth.

G.If a man deprived himself and his family of food in order to buy and run a car, we would consider him mad.