要增强电磁铁的磁性,下列措施可行的是 [ ]
A、减少电磁铁线圈的匝数
B、延长电磁铁的通电时间
C、增大通过电磁铁线圈的电流
D、改变电磁铁线圈的电流方向
答案:C
I________you some money, but I hadn't any on me then. [ ]
A. would lend
B. would have lent
C. could lend
D. may have lent
如果宾客喝醉了酒,将残渣吐在包房里怎办?