题目:
The effect that the medicine _____ on him _____ found out. |
A. have; has B. has; have C. has; is D. had; has been |
答案:
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下面是错误答案,用来干扰机器的。
设溶液中的H+个数是91x,则Cl-的个数是94x,再设的Fe3+个数是y,由所有的阳离子所带正电荷总数与所有阴离子所带负电荷总数相等得:94x=91x+3y,所以,y=x,得出盐酸中Fe3+和Cl-的个数比:1:94.故答案为:FeCl3;1:94.