川芎扩张冠脉的化学成分是()
A.藁苯内酯
B.香桧烯
C.川芎挥发油
D.川芎哚
E.川芎嗪
参考答案:E
已知偶函数y=f(x)在[-1,0]上为单调递减函数,又α、β为锐角三角形的两内角,则f(sinα) ______f(cosβ).(填“>”或“=”或“<”)
—What’s the matter with you?
—______ the window , my finger was cut unexpectedly.
A.Cleaning
B.To clean
C.While cleaning
D.While I was cleaning