图书馆工作标准化的原则:()
a科学性原则;
b简化原则;
c统一原则;
d协调原则;
e稳定继承原则。
A.abcd
B.abcde
C.abce
D.acd
参考答案:B
He said he hadn't done that, but his expression ________. [ ]
A. gave him up
B. gave him away
C. gave in him
D. gave out him
列车运行速度不超过120km/h的区段,预告信号机与其主体信号机的安装距离不得小于()。
A、800m
B、900m
C、1000m
D、1100m