题目内容

67（）

A. takes
B. extension
C. makes
D. derives

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By now you’ve sat with your legs crossed, with your hands in your lap, with your hands on the armrests--even with your hands crossed behind your head. The end comes just at the right time. (Passage 1)

63（）

A. for
B. in
C. of
D. about

这个星期天气很干燥。

用户关系模式R中所有的属性都是主属性，则R的规范化程度至少达到 _______ 。