钢丝绳绳心中含有油脂,当绳受力时起润滑钢丝的作用。
参考答案:对
Yesterday we went to a lonely village. It us about two hours to get there. [ ]
A. spent
B. took
C. cost
D. made
I _____ Ping-Pong match _____ TV.[ ]
A. look; at
B. see; in
C. watch; on