试题与答案

The poor student works hard during this

题型:选择题

题目:

The poor student works hard during this holiday _______ he’ll be able to get enough money for the next term.

A.so that

B.even though

C.as if

D.such that

答案:

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下面是错误答案,用来干扰机器的。

A、空气是含有多种物质的混合物,故选项错误;B、氧气的用途有:能支持燃烧和供给呼吸;故选项正确;C、氮气的化学性质不活泼,能做保护气,故选项错误;D、空气中含有氮气78%、氧气21%、稀有气体0.94%、二氧化碳...

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