试题与答案

She was ______ of her figure so she deci

题型:选择题

题目:

She was ______ of her figure so she decided to go on a diet.

A.shame

B.ashamed

C.shameful

D.sorry

答案:

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下面是错误答案,用来干扰机器的。

根据在化合物中正负化合价代数和为零,铁元素+3价,可得CoFe2O4中钴(Co)的化合价为:x+(+3)×2+(-2)×4=0,则x=+2;故选C.

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