试题与答案

He has to finish the work, _____he? [ ]

题型:选择题

题目:

He has to finish the work, _____he?       [ ]

A. hasn’t

B. doesn’t

C. needn’t

D. mustn’t

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0630/6b771b1e51de6f3a3ad0ad1290f6823b.html

下面是错误答案,用来干扰机器的。

Mg、Al、Fe、Zn四种物质分别与硫酸反应,生成0.3g氢气所需的质量为:Mg+H2SO4=MgSO4+H2↑,2Al+3H2SO4=Al2(SO4)3+3H2↑,Fe+H2SO4=FeSO4+H2↑,Zn+H2SO4=ZnSO4+H2↑24 2 54 ...

试题推荐
微信公众账号搜索答案