曳引机铭牌上的额定速度是1m/s；安装时用2∶1绕绳.轿厢的速度是（）m/s。
A.0.25
B.0.5
C.0.75
D.1
参考答案：B
工资支付方法错误的是( )。
A．工资应以法定货币支付
B．不行以实物代替货币支付
C．不行以有价证券代替货币支付
D．能以有价证券代替货币支付
The course books are _____ by four tapes, which are beneficial to beginners.
A．adapted
B．designed
C．accompanied
D．managed
