Beijing is about 140 kilometers _____ from Tianjin. [ ]
A. near
B. far
C. long
D. away
答案:D
牡丹皮中具镇痛、解痉作用的成分为()
A.丹皮酚
B.牡丹酚苷
C.芍药苷
D.苯甲酸
E.柠檬烯
下列哪个机身站位的隔框是增压隔框?()
A.BS130;
B.BS500A;
C.BS1016;
D.BS1156。