汽车维修企业的内径千分尺应当强制检定。
参考答案：对
I can't sleep, so I ______ listen to quiet music, and I ______ listen to exciting music.[ ]
A. should, should
B. shouldn't, shouldn't
C. should, shouldn't
D. can, don't
以下选项属于车尼尔尼雪夫斯基《怎么办》中的主人公的是（）。
A.罗普霍夫
B.薇拉
C.薇拉的母亲
D.薇拉的父亲
