Why did the African nations welcome&nbs-考呗网题库移动版

单选题 Why did the African nations welcome an ivory ban? ______

A． The rate of killing has been accelerating
B． The US government forbids imports of both raw and finished ivory
C． They realized that the killing of elephants is a serious threat to their tourist business
D． African people advocated an ivory ban

参考答案C

解析:【答案】C。解析：本题为细节考查题。由第三段“…but increasinglv thev realized that the decimarlon ofthe elephant herds poses a serious threat to their tourist business．”可知，答案C正确。

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单选题 What' s the author' s attitude? ______

A． Subjective
B． Neutral
C． Pessimistic
D． Active

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单选题根据以下材料，回答题
Water problems in the future will become more intense and more complex. Our increasing population will tremendously increase urban wastes, primarily sewage. On the other hand, increas-ing demands for water will decrease substantially the amount of water available for diluting wastes.
Rapidly expanding industries which involve more and more complex chemical processes will pro-duce large volumes of liquid wastes, and many of these will contain chemicals which are poi-sonous. To feed our rapidly expanding population, agriculture will have to be intensified. This will involve ever-increasing quantities of agriculture chemicals. From this, it is apparent that drastic steps must be taken immediately to develop corrective measures for the pollution problem.
There are two ways by which this pollution problem can be lessened. The first relates to the treatment of wastes to decrease their pollution hazard. This involves the processing of solid wastes prior
to disposal and the treatment of liquid wastes, or effluents, to permit the reuse of the water or best reduce pollution upon final disposal.
A second approach is to develop an economic use for all or a part of the wastes. Farm manure is spread in fields as a nutrient or organic supplement. Effluents from sewage disposal plants are used
in some areas both for irrigation and for the nutrients contained. Effluents from other process-ing plants may also be used as a supplemental source of water. Many industries, such as meat and poultry processing plants,are currently converting former waste production into marketable
byproducts. Other industries have potential economic uses for their waste products.
The purpose of this passage is

A． to warn the reader of the dwindling water supply
B．to explain industrial uses of water
C．to acquaint the reader with water pollution problems
D．to demonstrate various measures to solve the pollution problem

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单选题Which of the following points is not included in the passage?

A．Industrial development includes the simplification of complex chemical processes
B．Diluting wastes needs certain amount of water
C．Demands for water will go up along with the expanding population
D．Intensive cultivation of land requires more and more chemicals

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