用于鉴别遗传性球形红细胞增多症和自身免疫溶血型贫血的是
A.家族史
B.红细胞渗透脆性试验
C.Coombs试验
D.自身溶血试验及纠正试验
E.酸溶血试验
参考答案:C
Our playground is not so tidy and beautiful as before. Students must _____ dirty things on it.
A.be stopped to throw
B.be stopped from throwing
C.stop to throw
D.stop from throwing
在一场象棋循环赛中,每位棋手必须和其他棋手对弈一局,且同一对棋手只对弈一次。这次比赛共弈了36局棋,问棋手共有几位()
A.6
B.7
C.8
D.9