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【单选题】

Our surroundings are being polluted faster than ever and it seems that people cannot pr it.Time is bringing us more people, and more people will bring us more industry, more cars, larger cities, and the growing use of man made materials.
What can explain and settle this problem? The fact is that pollution is caused by man by his desire for a modem way of life.We make 'increasing industrialization' our first aim.So we can often ready to offer everything: clean air, pure water, good food, our health and the future of our children.There is a constant(不断的) flow of people from the countryside into the cities, eager for the achievements of our modem society.But as our technological(技术的) achievements have grown in the last twenty years, pollution has become a serious problem.
Isn't it time we stopped to ask ourselves where we are going—and why? It makes one think of the story about the pilot who told his passengers over the loudspeaker(扩音器): 'I've some good news and some bad news.The good news is that we were rapid progress at 530 miles per hour.The bad news is that we are lost and don't know where we're going.' The sad fact is that this becomes a true story when speaking of our modem society.
Man cannot pr the world from being polluted because ______.

A.
people use too many man-made materials
B.
the pupulation of the world is increasing faster
C.
we are producing more cars, trucks and buses
D.
we have more and more industry
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参考答案:
举一反三

【单选题】常用的浓缩技术有()

A.
沉降和过滤
B.
过滤和离心分离
C.
常压干燥和减压干燥
D.
喷雾干燥和冷冻干燥
E.
蒸发和蒸馏

【单选题】应用较广泛的深度处理技术不包括______。

A.
活性炭吸附
B.
生物接触氧化
C.
生物活性炭
D.
臭氧氧化

【单选题】下列哪一生产技术或情况不是形成假迹象的来源?

A.
差的表面准备;
B.
压固的工件;
C.
对渗透剂不正确的冲洗;
D.
工件不正确的热处理;

【单选题】下列有关分离工艺机床使用技术安全操作规程的说法正确的是()

A.
操作前要做好一切劳动保护工作
B.
检查机床周围有无障碍物,要确保工作地整洁有序
C.
试车:在确认机床情况正常后才能启动运转,观察有无异常现象
D.
机床未在润滑良好的情况下也可操作
相关题目:
【单选题】常用的浓缩技术有()
A.
沉降和过滤
B.
过滤和离心分离
C.
常压干燥和减压干燥
D.
喷雾干燥和冷冻干燥
E.
蒸发和蒸馏
【单选题】应用较广泛的深度处理技术不包括______。
A.
活性炭吸附
B.
生物接触氧化
C.
生物活性炭
D.
臭氧氧化
【单选题】下列哪一生产技术或情况不是形成假迹象的来源?
A.
差的表面准备;
B.
压固的工件;
C.
对渗透剂不正确的冲洗;
D.
工件不正确的热处理;
【单选题】下列有关分离工艺机床使用技术安全操作规程的说法正确的是()
A.
操作前要做好一切劳动保护工作
B.
检查机床周围有无障碍物,要确保工作地整洁有序
C.
试车:在确认机床情况正常后才能启动运转,观察有无异常现象
D.
机床未在润滑良好的情况下也可操作
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