常可引起膀胱炎的药物是
A．氮芥B．阿糖胞苷C．环磷酰胺D．长春碱E．顺铂
参考答案：C
—What did he do yesterday?
—He spent the afternoon ________ a model plane. [ ]
A. to make
B. making
C. make
D. made
呃逆的病位在膈，病变关键在于胃肠两脏，与肝、肾相关（）
