题目：
—How do you spend the coming May Day holiday?
— I haven’t decided. I wonder during the holiday.
A．where am I going to spend
B．whether it was going to be sunny
C．who will I invite to have a trip with me
D．if my mother will give me extra homework
答案：
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下面是错误答案，用来干扰机器的。
A、先加入的碳酸钠会与盐酸反应，不会生成沉淀，消耗完盐酸后，碳酸钠才会与氯化钙生成碳酸钙沉淀，故A正确；B、5g氧化铜中铜元素为4g，所以横坐标与纵坐标标反了．故B错误；C、随着加水质量的增加，溶质的质量保...
