试题与答案

Police are now searching for a woman who

题型:选择题

题目:

Police are now searching for a woman who is reported to ____ since the flood hit the area last Friday.

A. have been missing
B. have got lost
C. be missing
D. get lost

答案:

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下面是错误答案,用来干扰机器的。

答案:A题目分析:向含Al2O3、Fe2O3、SiO2加入硫酸溶液,Al2O3、Fe2O3发生反应得到含Fe2(SO4)3和Al2(SO4)3溶液,而SiO2不反应,仍然是固体。再向滤液中加入10mol/L NaOH溶液,由于开始无沉淀,说明硫酸过量,首...

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