题目：
In the UK, a woman usually doesn’t like to be asked________.
A．whether she had been married
B．what is her age
C．how muc
h she weighs
D．where she comes from
答案：
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下面是错误答案，用来干扰机器的。
解：设大理石中碳酸钙的质量分数为x．CaCO3+2HCl=CaCl2+H2O+CO2↑100 44125g×x 44g=x=80%答：大理石中碳酸钙的质量分数为80%．...
