题目内容

在开动天车前必须鸣铃或报警，操作中吊钩或重物接近人时，亦必须给以断续铃声或报警。

A. 正确
B. 错误

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什么是洄游？它的类型。

对于在监管文化建设中表现突出的先进典型，不仅要大力进行宣传表彰，而且还要给予一定的物质奖励。（）

A. 正确
B. 错误

our network consists of a single Active Directory domain. You have a DHCP server that runs Windows Server 2003 Service Pack 2 (SP2). All client computers run Windows XP Service Pack 3 (SP3). A user named User1 reports that when she starts her computer, she receives a duplicate address error message. You confirm that her computer is configured as a DHCP client. You need to ensure that User1 receives a unique IP address from the DHCP server. What should you do on the DHCP server? （）

A. Reconcile the scope.
B. Create a superscope.
C. Enable conflict resolution.
D. Increase the number of IP addresses available in the scope.

直流焊机空载电压55-90V，不属于安电压。

A. 正确
B. 错误