基准孔的下偏差为()。
A、正数
B、负数
C、零
D、整数
参考答案:C
My father told me ___ any more when it was late. [ ]
A. didn't write
B. not write
C. not to write
D. don't write
义务消防队员及其他在场人员,灭火时,必须运用先(),后(),救人重于救火、先重点、后一般等原则。