问题 选择题

流经北京市的永定河近年来严重缺水甚至断流。据此完成问题。

小题1:永定河缺水断流的主要人为原因是沿岸地区

A.生活污水排放

B.工农业用水增加

C.交通设施建设

D.大量人口迁入小题2:北京市建设永定河绿色生态发展带,适宜发展的产业是

A.电子信息

B.现代物流

C.高端商贸

D.休闲旅游小题3:永定河流域综合整治与开发的合理措施是

A.上游植树造林

B.中游发展航运

C.下游开发水能

D.发展灌溉农业

答案

小题1:B

小题2:D

小题3:A

题目分析:

小题1:河流缺水断流的人为原因主要从人类的大量引水导致河流水量下降分析,水污染不会导致断流,交通建设和人口迁入对河流流量的影响不大。

小题2:利用河流沿岸的生态环境,适宜发展旅游业,而电子信息、现代物流、高端商贸的布局与河流绿化带没有直接联系。

小题3:河流流域的综合整治措施可借鉴田纳西河流域的开发,并与当地的实际相结合。航运条件应主要在下游地区,开发水能资源应主要位于中上游地区,而河流下游出现断流,故不适宜发展灌溉农业,故上游山区的植树造林可保持水土,涵养水源,利于改善河流流域的生态环境。

点评:本题解题关键是学会相关知识内容的调用能力和因地制宜的综合分析能力。难度一般。

阅读理解

When Babbage was working at Cambridge, a new idea occurred to him. He wanted to construct a calculating machine to work out the solutions(解法)to maths problems not only with correctness but also with a speed beyond the power of any human mind. His machine could solve problems involving(涉及)long rows of figures in one continuous operation(运算).

In 1822 Babbage exhibited his invention and won a prize from the government. After that, he immediately started to work on a larger machine designed to solve more difficult problems. Although he received some money left by his father, the money was not enough to support his design. He wrote to the government about his plan and was given £2500 to start with, a sum worth much more in those days than it is now.

Babbage continued his work in London for four years. Then his health broke down, and he had to take a long holiday abroad. When he returned to London in 1828, he was at the end of his resources. Many bills remained unpaid. His chief assistant and co-workers quarreled with him and left with many expensive tools. For one year no work was done. During this period, Babbage, whose mind was always active, suddenly thought of a completely new idea for the machine. He rushed to meet the government officials to explain his new idea. But this time, they were unwilling to help him. For eight years, they refused to say whether they wanted the machine or not, and their final answer was “No.”

From 1828 to 1839, Babbage held the position of professor at Cambridge very successfully. But his greatest work was the unfinished calculating machine which stood covered in dust in his house. It was the beginning of the modern computer.

60.The machine Babbage designed would solve difficult maths problems _________.

A.in one operation with few mistakes

B.in more than one operation without any mistakes

C.in more than one operation with slight mistakes

D.in one operation without any mistakes

61.Babbage failed to continue his research work in 1828 mainly because _______.

A.he was in poor health                B.he almost ran out of money

C.his co-workers argued with him         D.he spent all his money on his bills

62.Babage explained his new idea to the government officials, expecting that _________.

A.they would agree to his plan             B.they would pay for his new idea

C.they would support him with money    D.they would exhibit his new design

63.From the passage, we can infer that __________.

A.Babbage failed to be a famous scientist at Cambridge

B.Babbage always had new ideas but gave them up easily

C.Babbage always needed support from the government officials

D.Babbage was the first designer of the modern computer

判断题