《继电保护和安全自动装置技术规程》规定，有专用跳闸出口回路的单母线及双母线断路器失灵保护应装设（）元件。
参考答案：闭锁
结核性脑膜炎发病约占结核病的（）
A.1%
B.2%
C.3%
D.4%
E.6%
What if everyone ________ me? [ ]
A. doesn't know
B. don't know
C. won't know
D. didn't know
