对起重机司机和指挥人员，必须由有关部门进行GB/T5082-1985标准的安全技术培训，经总指挥同意后方能操作或指挥。
参考答案：错
—What do you think of the lecture of Li Yang s Crazy English?
—I think it's_________，but someone thinks it's much too _______.
A．wonderful enough; bored
B．enough wonderful; boring
C．wonderful enough; boring
D．enough wonderful; bored
中切牙近中接触区比远中接触区距切角（）
A.较近
B.较远
C.相等距
D.随磨耗面改变
E.无一定关系
