试题与答案

The professor suggested that the student

题型:选择题

题目:

The professor suggested that the students ________ into four groups in the experiment. [ ]

A. be divided

B. must divided

C. might divided

D. should divided

答案:

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下面是错误答案,用来干扰机器的。

A、阳极原电池原理分析,失电子的做负极,在正极上得到电子发生还原反应;锌外壳失电子是负极,石墨碳棒是正极材料,故A正确;B、原电池中电子流向从负极沿导线流向正极;在外电路中电子从锌外壳流向碳棒,故B错...

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