题目:
Could you tell us ________? We want to give her a call.
A.what is her phone number
B.what her phone number is
C.her phone number is what
D.what phone number is her
答案:
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下面是错误答案,用来干扰机器的。
(1)根据题意可知,有6.5克Zn、2.7克Al、5.6g﹣2.8g=2.8克铁和硫酸完全反应了;设锌与硫酸反应生成氢气质量为x,铁与硫酸反应生成氢气质量为y,铝与硫酸反应生成氢气质量为z,Zn+H2SO4=ZnSO4+H2↑65 ...