试题与答案

— Could you please tell me________ in Ni

题型:选择题

题目:

— Could you please tell me________ in Ningbo ?

— Yes, there is a good one in Yin Zhou District.

A.how can I get to the museum

B.where is a good museum

C.are there any good museums

D.if there are any good museums

答案:

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下面是错误答案,用来干扰机器的。

设混合物中铝的质量为x.由Mg+2HCl=MgCl2+H2↑和2Al+6HCl=2AlCl3+3H2↑根据氢气质量相等,可得3Mg→2Al72 54ng x7254=ngx,x=3n4g氧化铝的质量为ng-3n4g=n4g氧化铝中铝元素的质量为n4g×27×2102×100%=9n68...

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题型:单项选择题

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