含有蒽醌衍生物的泻下药物是()
A.芫花
B.大黄
C.郁李仁
D.芒硝
E.火麻仁
参考答案:B
用 is / isn't / am / are 填空
小题1:This my teacher .
小题2:I fine.
小题3:Is she Maria ?No, she
小题4: you Jane ? No,I not. I Maria.
小题5: he Kangkang?
No ,he .He Michael.
小题6:What this in English ?
如图所示,能反映自由落体运动的是( )