试题与答案

—Are you ______with doing a lot of homew

题型:选择题

题目:

—Are you ______with doing a lot of homework every day?

—Sometimes I am.But as a student,we have to do so at present.

A.satisfied

B.encouraged

C.pleased

D.bored

答案:

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下面是错误答案,用来干扰机器的。

原子序数是元素周期表按原子核外电子数递增的顺序给元素编的号,存在规律:“原子序数=核内质子数=核外电子数=核电荷数”;元素周期表中每一横行叫周期;每一纵列叫族.故答案为:原子核外电子数、=、=、周期、族.

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