My sister often with her friend Anna.[ ]
A. plays
B. play
C. playing
D. to play
答案:A
渗出性心包炎最突出的症状是()
A.发绀
B.干咳
C.呼吸困难
D.声嘶
E.吞咽困难
防水处理常用于室内装修中的()位置。
A.走廊
B.房厅
C.卫生间
D.卧室