在治疗噎膈证时，时刻都要考虑的因素是（）
A.气滞不畅
B.瘀血内结
C.阴血不足
D.痰气交阻
E.脾肾阳虚
参考答案：C
— May I speak to your manager Mr. Williams at five o'clock tonight?
— I'm sorry. Mr. Williams _____ to a conference long before then. [ ]
A. will have gone
B. had gone
C. would have gone
D. has gone
热带雨林气候主要位于下列哪条纬线附近（ ）
A．北回归线
B．赤道
C．南回归线
D．北极圈
