题目内容

以碳酸钙为基准物标定EDTA时,为使终点变色明显,必须加入镁溶液。

A. 对
B. 错

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Under her leadership, the group’s ______ grew from less than one million dollars to more than ten million.

A. data
B. budget
C. item
D. piece

Her friend knows where he can ______ a good used car for her at a reasonable price.

A. choose
B. pick out
C. pick up
D. reach

Information and knowledge in IT industry ______ very fast.

A. outdated
B. keeps
C. releases
D. updates

You can stay at my cottage in the country ______ you like.

A. whatever
B. whenever
C. wherever
D. whoever

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