A．电动机
B．发电机
C．电磁铁
D．电铃
答案：B
The clerk________his letter is working in our company. [ ]
A. referred
B. referred to
C. referred to in
D. referred in
从市场设立制度来看，市场的增加或减少会影响市场股票的供给，新增市场会减少整个市场股票的供给，反之亦然。( )
