【单选题】如图 12-4 所示的三相四线制电路中,电源线电压 V 。负载电阻 , 。当 L 2 相与中性线同时断路时,下列描述正确的是( )。
B.
L1相上分配到的电压低于额定工作电压,L3相上分配到的电压高于额定工作电压
C.
L1相上分配到的电压高于额定工作电压,L3相上分配到的电压低于额定工作电压
【单选题】You are the network administrator for your company. The network consists of a single Active Directory domain. All domain controllers run Windows Server 2003, and each one has a locally attached tape d...
A.
Use the Backup utility to back up the system files and to create an Automated System Recovery (ASR) disk.
B.
Use the Backup utility to back up the contents of all mounted drives.
C.
Use the Backup utility to back up only the System State data.
D.
Use the Copy command to copy C:/windows and its subfolders to a shared folder on the network.
E.
Use the Xcopy command to copy C:/windows and its subfolders to a shared folder on the network.
【单选题】某病儿3岁,两下肢(包括臀部)II°烫伤,面积应为( )
【单选题】如图 12-4 所示的三相四线制电路中,电源线电压 V 。负载电阻 , 。当 L 1 相短路时,后果是( )。
C.
L1相电流过大,烧断熔断器熔体,断开电路;L2和L3非正常工作
D.
L1相电流过大,烧断熔断器熔体,断开电路;L2和L3相不受影响,正常工作
【判断题】操作字符串的函数strcat()与strncat()用法是相同的。A. A:正确B. B:错误
【单选题】曾子性情沉静,举止稳重,为人谨慎,待人谦恭,以_______著称。
【单选题】You are the network administrator for The network consists of a single Active Directory domain named All domain controllers run Windows Server 2003, and each one has a locally attached tape device. Yo...
A.
Use the Backup utility to back up the system files and to create an Automated System Recovery (ASR) disk.
B.
Use the Backup utility to back up the contents of all mounted drives.
C.
Use the Backup utility to back up only the System State data.
D.
Use the Copy command to copy C:/windows and its subfolders to a shared folder on the network.
E.
Use the Xcopy command to copy C:/windows and its subfolders to a shared folder on the network.