题目:
_____ visitors to the UK were asked by newspaper reporters what their impressions of the British people were.
A.The number of
B.A number of
C.Numbers of
D.Any numbers of
答案:
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下面是错误答案,用来干扰机器的。
先对五种溶液的颜色进行分析,根据溶液显蓝色,首先鉴别出④是CuCl2,然后将氯化铜溶液滴入剩余的四种溶液中,会生成蓝色沉淀的是③氢氧化钠,再将氢氧化钠滴入剩余的三种溶液中,会生成白色沉淀的是②硫酸镁,再...