抗溶血性链球菌溶血素“O”增高,主要表明:()
A.患风湿热
B.正患溶血性链球菌感染
C.曾患溶血性链球菌感染
D.正患急性肾炎
E.正患猩红热
参考答案:C
She had just finished her homework______________ her mother asked her to practise playing the piano yesterday. [ ]
A. when
B. while
C. after
D. since
脑性瘫痪儿童在几岁以前进行康复治疗,还可能取得较好的疗效
A.1岁以内
B.2岁以内
C.6岁以内
D.3岁以内
E.10岁以内