静电的特点有()高,二是()突出,三是()现象严重
A、电压高
B、静电感应突出
C、尖端放电现象严重
D、电量小
参考答案:A, B, C
连词成句。
1. Jane, sister, her, is
__________________________
2. my, Amy, is, friend, this
3. photo, my, here, family, is, of, a
4. he, my, brother, is
5. much, I, them, love, very
阅读以下说明,回答问题。 [说明] Linux系统开机引导时首先启动内核,由内核检查和初始化硬件设备,载入设备的驱动程序模块,安装root文件系统,然后内核将启动一个名为init的进程。在init运行完成并启动其他必要的后续进程后,系统开始运行,引导过程结束。init进程启动时需要读取inittab配置文件,该文件确定init在系统启动和关机时的工作特性。典型的inittab文件内容见以下清单: # #inittab This file describes how the INIT pT ocess should set up #the system In a certain run-level. # #Default runleve1.The runlevels used by RHS are: #0-halt(Do NOT set initdefault to this) # 1-Single user mode # 2-Multiuser,without NFS(The same as 3,if you do not have networking) # 3-Full multiuser mode # 4-unused # 5-X11 # 6-reboot(Do NOT set initdefault to this) # id:5:initdefault: #System initialization. s1::sysinit:/etC/rc.d/rc.sysinit 10:0:wait:/etc/rc.d/rc 0 11:1:wait:/etc/to.d/rc 1 12:2:wait:/etc/rc.d/rc 2 13:3:wait:/etc/rc.d/rc 3 14:4:wait:/etc/rc.d/rc 4 15:5:wait:/etc/rc.d/rc 5 16:6:wait:/etc/rc.d/rc 6 #Trap CTRL-ALT-DELETE Ca::ctrlaltdel:/sbir/shutdown-t3-r now #When our UPS tells us power has falled,assume we have a few minutes #of power left. Schedule a shutdown for 2 minutes from now. #This does,of course,assunle you have powerd installed and your #UPS connected and working correctly. pf::powerfail:/sbin/shutdown-f-h+2 "Power Failure;System Shutting Down" #if power was restored before the shutdown kicked in,cancel it. Pr:12345:powerokwait:/sbin/shutdown-c "PowerRestored;Shutdo、vn Cancelled" #Run gettys in standard runlevels 1:2345:respawn:/sbin/mingetty tty1 2:2345:respawn:/sbin/mingetty tty2 3:2345:respawn:/sbin/mingetly tty3 4:2345:respawn:/sbin/mingetty tty4 5:2345:respawn:/sbin/mingetty try5 6:2345:respawn:/sbin/mingetty tty6 #Run xdm in runlevel 5 x:5:respawn:/etc/X11/prefdm -nodaemon
根据上述inittab文件的内容,系统在引导过程结束前,至少还要执行______进程。
A.rc.sysinit
B.rc.sysinit和rc 5
C.rc.sysinit、rc 0、rc 1、rc 2、rc 3、rc 4、rc 5和rc 6
D.rc 0、rc 1、rc 2、rc 3、rc 4、rc 5和rc 6