治疗水肿胀满，大便秘结，小便不利，首选药物是（）
A.大黄
B.牵牛子
C.番泻叶
D.巴豆
E.芒硝
参考答案：B
Isn't it time you _____ his advice that you ______ your study plan? [ ]
A. follow, must change
B. should follow, will change
C. must follow; changed
D. followed; change
时间序列数据呈现不固定的周期变动，且周期长于一年的是（）
A、长期变动趋势
B、循环变动
C、随机变动
D、季节性变动
