阴亏血虚者应慎用的药是（）
A.止血药
B.消食药
C.退虚热药
D.祛风湿药
E.清热凉血药
参考答案：D
—Is that your English book?
—______. [ ]
A. That isn't
B. Yes, that is
C. No, it isn't
D. No, that is
如图中的工具属于省力杠杆的是 [ ]
A.
B.
C.
D.
