Those who are not active or______ diet is high in fat will put on weight quickly.

A．what

B．that

C．which

D．whose

如果暖风机开关开到任一挡电机都不转动，检查电机搭铁线有电，则说明（）不良。

A.搭铁

B.开关

C.保险

D.火线