New Rules and Behavior Standards(行为规范) for middle school students has come out.

As a student, you’re supposed to ________ according to it.

①tell the truth

②fight against your classmates often

③be open to new idea

④protect yourself

⑤cheat in the exam

A. ①②④   B. ①③⑤    C. ①③④

能内收、旋内和屈肩关节的是（）

A.胸大肌

B.前锯肌

C.大圆肌

D.冈下肌

E.冈上肌