风湿热的特征性表现为()
A.环形红斑
B.关节疼痛
C.不规则发热
D.血沉增快
E.心电图P-R延长
参考答案:A
I saw the boys _______ football in the gym when I passed by yesterday afternoon. [ ]
A. play
B. to play
C. plays
D. playing
不要将()伸到门架中间。
A.黄油枪
B.手、脚
C.机油壶
D.注油器