起重钢丝绳用杆接法连接时,杆接长度应为直径的15~20倍,但一般最短不得少于()。
A.500mm;
B.400mm;
C.300mm;
D.100mm。
参考答案:C
I'd rather have a room of my own, however small it is, than______ a room with someone else.
A.share
B.to share
C.sharing
D.to have shared
双线自动闭塞集中联锁()接发列车作业标准是()。