属于峻下逐水药的药物是（）
A.牵牛子
B.巴豆
C.甘遂
D.京大戟
E.芫花
参考答案：A, B, C, D, E
楔形板方向、度数允许精度（）。
A.50%
B.80%
C.90%
D.100%
E.±10
—What time do you usually get up ________ Sunday?
—I usually get up ________ 8:00.[ ]
A. at; at
B. on; at
C. on; on
D. at; on
