关于慢性腰肌劳损,正确的是
A.是腰骶部软组织慢性疼痛的总称
B.腰部活动度正常
C.腰痛与气候变化有关
D.X线检查有特异性变化
E.主张腰肌功能锻炼
参考答案:A,B,C,E
Nothing is so easy as ________ parents to raise their expectations of their children too high.[ ]
A. of
B. to
C. by
D. for
“一个优秀的管理者,首先应是一名好的培训师。”请谈谈你对这句话的理解。