砂仁具有的功效是( )
A.燥湿健脾,祛风散寒B.化湿,解暑,止呕C.燥湿消痰,下气除满D.化湿行气,温中止泻,安胎E.化湿行气,止呕
参考答案:D
_______his homework, he was not allowed to play out.
A.Not finished
B.Having finished
C.Having not finished
D.Not having finished
点P为抛物线y2=2px(p>0)上的一点,F为抛物线的焦点,直线l过点P且与x轴平行,若同时与直线l、直线PF、x轴相切且位于直线PF左侧的圆与x轴切于点Q,则( )
A.Q点位于原点的左侧
B.Q点与原点重合
C.Q点位于原点的右侧
D.以上均有可能