苦味药的作用是（）。
A.清泄火热
B.通泄大便
C.降泄气逆
D.燥湿、坚阴
E.散结
参考答案：A, B, C, D
Human beings are different from animals _______ they can use language as a tool to communicate.
A．in that
B．for that
C．in which
D．for which
泵径70／44（mm／mm）的液压反馈抽稠泵柱塞冲程长度为1．2～6m，其理论排量为（）。
A.60～201m3／d
B.34～115m3／d
C.76～255m3／d
D.66～328m3／d
