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问题 单项选择题

在装置安装中施加的绝缘，其质量宜通过类似保证工厂制造的设备的( )质量试验的认可。

A．分隔
B．绝缘
C．联结
D．温度

答案

参考答案：B

解析： 直接接触防护的措施

单项选择题

Since life began eons ago, thousands of creatures have come and gone. Some, such as the dinosaurs, became extinct due to naturally changing ecologic conditions. More recent threats to life forms are humans and their activities. Man has drained marshes, burned prairies, dammed and diverted rivers. Some of the more recent casualties of man’’s expansion have been the dodo, great auk, passenger pigeon, Irish elk, and Steller’’s sea cow. Sadly, we can no longer attribute the increasing decline in our wild animals and plant species to "natural" processes. Many species are dying out because of exploitation, habitat alteration or destruction, pollution, or the introduction of new species of plants and animals to an area. As mandated by Congress, protecting endangered species, and restoring them to the point where their existence is no longer jeopardized, is the primary objective of the U.S. Fish and Wildlife Service’’s Endangered Species Program.

Which of the following is NOT a cause of increasing decline of wild animal population

A．Exploitation.

B．Pollution.

C．Habitat alteration.

D．Congressional law.
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单项选择题

下列事项中，会导致企业报告收益质量降低的是（）。

A．固定资产的折旧方法从直线折旧法改为加速折旧法

B．投资收益在净收益中的比重减少

C．应付账款比前期减少

D．存货比前期减少
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