煤、石油、天然气中共同含有的元素是( )
A.C,O
B.C,H,O
C.C,H,O,S,N
D.C,H
答案:D
-- How about camping this weekend, just for a change?
-- OK, __ you want.
A.whichever
B.however
C.whatever
D.whoever
踝关节扭挫伤患者的X线检查显示内外踝间隙增宽,提示损伤的组织是()
A.三角韧带
B.下胫腓韧带
C.腓距前韧带
D.腓跟韧带
E.腓距后韧带