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七叶内酯这种化合物属于香豆素。()

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由工件内应力造成的零件加工误差属于随机性误差。()

Which is not the lobbying reason of America?

A. The GM policies are prejudiced against US exports.
B. To allow GM foods into European markets is proof of free trade.
C. Biotech ingredients should not be stigmatized with a label.
D. Imported GMOs will not change European food standards.

公务员制度属于政治制度的范畴。()

我国公务员录用考试的基本方法有两种:一种是笔试,第二种是面试。()

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