桔梗具有的功效是()
A.润肺,止咳,下气,化痰
B.宣肺,利咽,清肺,化痰
C.宣肺,利咽,祛痰,排脓
D.降气,止咳,祛痰,排脓
E.降气,止呕,祛痰,排脓
参考答案:E
It was playing computer games______ cost the boy plenty of time_____ he ought to have spent doing his homework.
A.that; that
B.which; that
C.which; when
D.that; when
《广告法》禁止使用()做广告。
A.未授予专利权的专利申请
B.已经终止的专利
C.已经撤销的专利
D.已经无效的专利