公鸡有80只,比母鸡少30只,公鸡与母鸡只数的比是多少?
80+30=110(只)
公鸡只数:母鸡只数=80:110=8:11.
答:公鸡与母鸡只数的比是8:11.
When the teacher came in, the students stopped ______ and became very_______. [ ]
A. to talk, quiet
B. talking, quiet
C. to talk, quietly
D. talking, quietly
近端指间关节呈梭形肿胀常见于______
A.类风湿关节炎
B.风湿性关节炎
C.骨性关节炎
D.痛风性关节炎
E.系统性红斑狼疮