问题 单项选择题

在施工现场吊装某设备,工期为20天。在满足安全性的前提下,有四种方案可以选择:第一种是租用一台汽车吊,作业台班费为12万元,来回费用5万元,工期为5天;第二种是租用两台汽车吊抬吊,台班费14万元,工期8天;第三种是现场制作桅杆,制作安装费18万元(折旧费8万元,但本单位很少用到此类设备),工期18天;第四种是租用一台桅杆起重机,全部租赁费用9万元,工期为16天。应该选择()。

A.第一方案

B.第二方案

C.第三方案

D.第四方案

答案

参考答案:D

解析:应该选择选项D。因为选项A第一方案、B第二方案虽然工期短,但费用较高;而选项C第三方案虽然自己得到一台桅杆起重机,但很少使用,这样就积压了资金。而第四方案虽然比第三方案多化一万元,但工期满足要求,避免积压资金,所以选项D是正确选项。

阅读理解

Generations of Americans have been brought up to believe that a good breakfast is essential to one’s life. Eating breakfast at the start of the day, we have been told, and told again, is as necessary as putting gasoline in the family car before starting a trip.

But for many people, the thought of food as the first thing in the morning is never a pleasure. So in spite of all the efforts, they still take no breakfast. Between 1977 and 1983, the latest year for which figures could be obtained(可获得的), the number of people who didn’t have breakfast increased by 33%—from 8.8 million to 11.7 million—according to the Chicago-based Market Research Corporation of America.

For those who dislike eating breakfast, however, there is some good news. Several studies in the last few years have shown that, for grown-ups especially, there may be nothing wrong with omitting(省略) breakfast. “Going without breakfast does not affect work,” said Arnold E. Bender, former professor of nutrition at Queen Elizabeth College in London, “nor does giving people breakfast improve work.”

Scientific evidence linking breakfast to better health or better work is surprisingly inadequate(不适当), and most of the recent work involves(涉及) children, not grown-ups. “The literature,” says one researcher, Dr Earnest Polite at the University of Texas, “is poor.”

小题1:The main idea of the passage is _______.

A.breakfast has nothing to do with people’s health

B.a good breakfast used to be important to us

C.breakfast is not as important to us as gasoline to a car

D.breakfast is not as important as we thought before小题2:For those who do not take breakfast, the good news is that _______.

A.several studies have been done in the past few years

B.the omission of breakfast does no harm to one’s health

C.grown-ups have especially made studies in this field

D.eating little in the morning is good for health小题3:The underlined part “nor does giving people breakfast improve work” means _______.

A.people without breakfast can improve their work

B.not giving people breakfast improves work

C.having breakfast does not improve work, either

D.people having breakfast do improve their work, too小题4:The word "literature" in the last sentence refers to _______.

A.stories, poems, play, etc

B.written works on a particular subject

C.any printed material

D.the modern literature of America小题5:What is implied but not stated by the author is that _______.

A.breakfast does not affect work

B.Dr Polite works at an institution of higher learning

C.not eating breakfast might affect the health of children

D.Professor Bender once taught college courses in nutrition in London

单项选择题