继电保护器DL的动作时间为()。
A.0.04s~0.08s
B.0.08s~0.1s
C.0.08s~0.15s
D.0.1s~0.15s
参考答案:D
一Chinese National Day is coming. What are you going to do?
一I'll take a short _______ by bike. [ ]
A. travel
B. trip
C. distance
D. journey
()公差可以根据具体情况规定不同形状的公差带。
A、直线度
B、平面度
C、圆度
D、同轴度;