眩晕实证的基本病机是()
A.脑髓空虚,清窍失养
B.脾肾不足,水湿上泛
C.心肾阴虚,虚火上炎
D.痰火上逆,扰动清窍
E.痰火上扰,神明失主
参考答案:D
We are planning _____ the Great Wall for vacation. [ ]
A. visit
B. visited
C. visiting
D. to visit
某地夏季最高温度37℃,冬季最低温度-20℃,应选用的机油粘度等级为()。
A.5W/30
B.10W/30
C.15W/30
D.20W/30