扭矩M与转速N与功率P关系为（）
A、M=KxP/N
B、M=P/KxN
C、M=KxN/P
D、M=N/PxK
参考答案：A
— I’m terribly sorry to have put you through so much trouble.
— _____. I know you didn’t mean to.
A．Forget about it
B．No trouble
C．All right
D．You’re welcome
