CRT屏幕操作闭锁功能，只要输入正确的操作口令就有权进行操作控制。
参考答案：错
Bob, you watched the fashion show last night, _______? [ ]
A. weren't you
B. didn't you
C. haven't you
D. won't you
四氯化碳中毒的机制是
A．局部刺激B．缺氧C．抑制酶的活力D．干扰细胞或细胞器的生理功能E．麻醉作用
