体内外均有强大抗凝血作用的药物是( )
A.华法林
B.肝素
C.阿司匹林
D.尿激酶
E.枸橼酸钠
参考答案:B
Lucy went to Beijing _____ her mother.[ ]
A. for
B. with
C. and
—I'm sorry. I went out for a smoke just now.
—There is no for this while you are on duty.[ ]
A. reason
B. excuse
C. cause
D. explanation