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第1题

Mary ______ to go abroad for further education, but she gave it up later. A. is hoping B. was hoped C. had hoped
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第2题

3.将50ml0.5mol/LFeCl3溶液稀释为0.2mol/L 的溶液，需加水( ) A.75ml B.100ml C.150ml D.200ml E.250ml
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第3题

3.溶液稀释计算的依据是) A.稀释前后溶液的量不变 B.稀释前后溶质的量不变 C.稀释前后溶剂的量不变 D.稀释前后溶液的物质的量不变 E.稀释前后溶
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第4题

_______ more information, they could make the plan better than it is now. "A. Having given B. If giving C. Given
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