Usenet命名规则第一部分确定专题小组所属的大类，约有（）顶级类别。
A.6个
B.8个
C.10个
D.12个
参考答案：C
—Something is wrong _____ my car.
—Don't worry____ it. I can mend it.[ ]
A. with; about
B. about; with
C. in; with
D. in; about
政府绩效信息的“四化”？
