国家可以不设军队,但都毫无例外地建有自己的警察机构,设置专职的警察力量。 ( )
参考答案:对
—Does your brother like action movies?
—_____. He thinks they are exciting. [ ]
A. Yes, he does
B. Yes, he is
C. No, he isn't
D. No, he is
大型机床床身导轨的刮削,应该()。
A.在原机床基础上进行
B.将立柱先拆掉
C.将横梁先拆掉
D.不在原机床基础上进行