川芎茶调散中,善治少阳、太阳、阳明经头痛的药物是()
A.川芎、羌活、白芷
B.川芎、荆芥、防风
C.川芎、细辛、白芷
D.川芎、羌活、薄荷
E.白芷、防风、薄荷
参考答案:A
Tom ______ be in his office so late that night. I saw him with his friends in the restaurant .
A.can’t
B.may not
C.mustn’t
D.shouldn’t
下列关于9.8N/kg所表示的物理意义的表达中正确的是[ ]
A.9.8N等于1kg
B.1kg等于9.8N
C.质量是9.8kg的物体受到的重力是1N
D.质量是1kg的物体受到的重力是9.8N