试题与答案

长筒取心进尺32m,实取岩心29.5m,岩心收获率为()。A.82.5% B.92.

题型:单项选择题

题目:

长筒取心进尺32m,实取岩心29.5m,岩心收获率为()。

A.82.5%

B.92.2%

C.63.7%

D.100%

答案:

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参考答案:对

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题型:阅读理解
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       We all need a healthy environment, but we produce waste every day and it does harm to our
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going into the environment. Before we buy something new, think if it is really necessary or maybe the
old one will be just as good! When we do buy things, choose local products if possible, and try not to
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       Reuse means "use again". Use things for as long as possible. When we buy things, make sure that
they last a long time. We should take care of them so that they will last, and we should repair them if we
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into something else, it's better than throwing things away or burning them. Find out what can be recycled
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To recycle

Change things into something   8  
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away or burn them.
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