How did they get there

A．They started to look for the subway station.

B．They Would rather drive than go by subway.

C．They went by subway because the car wasn’t working.

D．They drove so they wouldn’t have to go by subway.

定子常采用导磁率高、损耗小的（）片叠压而成。

A.铁钴合金；

B.铁镍合金；

C.硅钢；

D.超导钢。