( )是为汽车形式提供动力的装置。
A．电气设备
B．发动机
C．车身
D．底盘
参考答案：B
两胁作痛，头痛目眩，口燥咽干，神疲食少，脉弦而虚，宜选（）
A.四逆散
B.逍遥散
C.痛泻要方
D.小柴胡汤
E.一贯煎
Not until I began to work ____ how much time I had wasted.
A．didn’t I realize
B．did I realize
C．I didn’t realize
D．I realized
