Her friend did everything in his ________ to help with her business.

A．energy

B．power

C．strength

D．force

进口医疗器械的注册证格式为（）

A.×械注准×××××××××××

B.×械注进×××××××××××

C.×械注许×××××××××××

D.×械注备×××××××××××