题目:
_______ made the parents proud was________ their son had been admitted to a key university.
A.What; because
B.What; that
C.That; what
D.That; because
答案:
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答案:C题目分析:配制物质的量浓度的溶液不能将溶质溶于多少升水中,而是将溶质溶于水配成多少升的溶液。0.2mol/L CuSO4溶液中Cu2+的浓度为0.2 mol ∕ L,取出一部分溶液,Cu2+的浓度不变。配制200mL0.2mol/...