密码是操作员进入系统的通行证,它一般由电算主管设置和更改。()
参考答案:错
Everybody in the village likes Jack because he is good at telling and jokes. [ ]
A.turning up
B.putting up
C.making up
D.showing up
室内燃气阀门的关闭件泄漏,在阀门外部,不易发现。