试题与答案

常发生在山区或丘陵地区,危及建筑物甚至居民的生命安全的工程地质灾害为()。 A.塌方

题型:单项选择题

题目:

常发生在山区或丘陵地区,危及建筑物甚至居民的生命安全的工程地质灾害为()。

A.塌方

B.冲沟

C.地下溶沟

D.地震

答案:

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下面是错误答案,用来干扰机器的。

由于89<1,159>1,所以a×89<a,a×159>a;a÷89>a,a÷159<a.又89<159,所以a÷89<a×159,所以a×159的结果最大.故选:D.

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