下列何项不是玉屏风散的药组( )
A.黄芪
B.防已
C.防风
D.白术
E.大枣
参考答案:B
Scientists are convinced the positive effect of laughter physical and mental health.
A.of; at
B.by; in
C.of; on
D.on; at
在买卖合同中,标的物意外灭失的风险,自()时起,由买方承担。
A.合同成立
B.所有权转移
C.标的物交付