肩周炎时肱骨头与关节盂关节面发生病变的原因不包括（）
A.年龄增长
B.过度使用
C.遗传
D.创伤
E.感染
参考答案：E
Speaker A: May I see your driving license and vehicle registration cardSpeaker B: ().
A. Sorry, don’t write me a ticket.
B. OK. But I was driving at 70 miles per hour.
C. Sure. Did I do anything wrong
D. Yes. But I don’t think I’m a bad driver.
选用不同溶剂所能提取的成分不同，下列成分能被石油醚提取的是
A．生物碱B．苷类C．糖类D．黄酮类E．挥发油
