三相异步电动机在空载运行时，其转差率( )。
A．S≈0
B．S≈0.01
C．S≈0.1
D．S≈1
参考答案：A
A seaman has a small，gaping laceration of the arm that is not bleeding excessively. What can be done as an alternative to suturing to close the wound?（）
A.Wrap a tight bandage around the wound
B.Apply a compression bandage
C.Use temporary stitches of sail twine
D.Apply butterfly strips，then a sterile dressing
在年度报告中披露证券承销业务的经营情况，证券公司应按承销期初的汇率将外币折合成人民币。( )
