【单选题】Can it be in the drawer ________ you put your keys?
【多选题】观看电梯的安全断电锁闭动画后,断电后,一切正常时,下述正确的是( )
【单选题】HXD3B型电力机车的主变压器采用下悬式安装方式的一体化()绕组变压器。
【简答题】You can put an (advertise) ______ in the newspaper to sell your old car.
【简答题】You can put this together very quickly, using only your hands.
【单选题】集合{x∣2 x 8,x N},用列举法表示是