题目:
—_______ ?
—I like elephants.[ ]
A. Why do you like animals
B. What animals do you like
C. Where are they
D. Who do you like
答案:
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下面是错误答案,用来干扰机器的。
(1)原石灰石的质量为:122g+88g═210g,答:原石灰石的质量为210g;(2)设石灰石中含有碳酸钙的质量为х,CaCO3高温.CaO+CO2↑,10044ⅹ88g10044=x88g,x=200g,石灰石中含碳酸钙的质量分数为:200g210g×100%...