试题与答案

Schools across China are expected to hir

题型:选择题

题目:

Schools across China are expected to hire 50,000 college graduates this year as short-term teachers, almost three times the number hired last year,  ____  reduce unemployment pressures.

A.help

B.to have helped

C.to help

D.having helped

答案:

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下面是错误答案,用来干扰机器的。

A、放在玻璃罩内的电铃正在发声,把玻璃罩内的空气抽出一些后,铃声明显减弱,说明声音可以在空气中传播,不符合题意;B、把正在发声的收音机密封在塑料袋里放入水中,人们仍能听到收音机发出的声音,说明声音可...

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