肩关节外展的主动肌是（）。
A.肱二头肌
B.肱三头肌
C.背阔肌
D.大圆肌
E.三角肌中部纤维
参考答案：E
Before the final examination, many students have shown________of tension.Some have trouble in
sleeping while others have lost their appetite.[ ]
A. signs
B. marks
C. anxiety
D. remarks
我国《企业会计准则》规定，会计要素包括______。
A．收入 B．费用C．利润 D．所有者权益
