He an important part in putting out the fire. [ ]
A. played
B. took
C. made
D. had
答案:A
墨家学说源自哪里?()
A.自然
B.丧葬之礼
C.匠心
D.清庙之守
所有磨牙都有的结构是()
A.远中牙尖嵴
B.斜嵴
C.近中边缘嵴
D.横嵴
E.颈嵴