引起心肌病变的各种病因中，目前国内外最常见的是
A．原发性心肌病B．冠心病C．病毒性心肌炎D．风湿性心肌炎E．中毒性心肌炎
参考答案：A
Not having work out the problem, leave the office. [ ]
A. so he was not allowed to
B. and he didn't want to
C. the teacher couldn't make him
D. he couldn't free himself to
冈上肌使肩关节（）
A.屈
B.伸
C.内收
D.外展
E.旋内
