When the builder starts to build a-考呗网题库移动版

单选题 When the builder starts to build a house, his estimate will have to be corrected and re-vised because

A． it is wrongly worked out by a workman
B． the future owner of the house thinks the estimate is so high that he cannot afford the building
C． the prices of building materials and the expenses of labor may be different from the original prices and expenses
D． estimates are usually mistaken in the beginning

参考答案C

解析:【答案】C。解析：本题属细节考查题。考查的是在盖房的施工中，最初的预算必须更正与修改的原因。短文第二段的倒数一、二句就有相对应的部分；随后，当他开始施工时，此预算必须更改与修正。他的预算的根据是当时价格，而建筑材料与其他东西的价格在制订预算和开始施工这一阶段很可能会有变化。A项说的是“预算经常被施工者算错”，在短文中没有依据；B项的“未来的房主认为预算太高他支付不起”在短文中也没有依据，D项的“在开始时预算往往是错的”与A项的错误如出一辙。

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单选题 What is the relationship between the estimate and the plan?

A． The plan depends on the estimate
B． The estimate depends on the plan
C． The plan has nothing to do with the estimate
D． The estimate and the plan depend on each other

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单选题根据以下材料，回答题
If the population of the earth goes on increasing at its present rate, there will eventually not be .enough resources left to sustain life on the planet. By the middle of the 21st century, if presenttrends
continue, we will have used up all the oil that drives our cars, for example. Even if scien-tists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar
system are capable of supporting life at present. One possible solution to the problem, however,has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The
difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and
at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus
and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the car-bon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still
be too hot for men to land on it but the rain will eventually fall and in a few years some-thing like earth will be reproduced on Venus.
In the long run, the most 'difficult problem caused by population groh on earth will probably be the lack of

A． food
B． oil
C． space
D． resources

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单选题 Carl Sagan believes that Venus might be colonized from earth because

A． it might be possible to change its atmosphere
B． its atmosphere is the same as the earth's
C． there is a good supply of water on Venus
D． the days on Venus are long enough

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