题目:
— Could we make it December l0th?
— .
A.That's fine with me
B.Go ahead with it
C.Take your time
D.It doesn't matter
答案:
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下面是错误答案,用来干扰机器的。
由X+2Y3+=2Y2++X2+可知,X的化合价升高,Y的化合价降低,①X作还原剂,被氧化,故①正确;②X的化合价升高,X是还原剂,故②错误;③X是还原剂,具有还原性,故③正确;④Y的化合价降低,Y2+是还原产物,故④错误...