题目内容

对无变速要求,但负载较大(110kw以上)的生产机械,一选用低压笼型电动机。

A. 正确
B. 错误

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电阻的阻值与电阻两端的电压同时增大2倍,则流经电阻的电流变为原来的2倍。

A. 正确
B. 错误

You plan to install Exchange Server 2010 Service Pack 1 (SP1) servers in an existing Exchange Server 2007 organization.All servers will coexist in a single Active Directory site. You need to identify which role must be transitioned to Exchange Server 2010 first. Which role should you identify?()

A. Hub Transport.
B. Mailbox Server.
C. Unfied Messaging.
D. Client Access Server.

在CorelDRAWX4默认状态下,下列方法中,能给轮廓线填充颜色的操作是()、()

A. 用鼠标左键单击调色板中的一种颜色
B. 用鼠标右键单击调色板中的一种颜色
C. 用鼠标双击调色板中的一种颜色
D. 使用轮廓工具下的“轮廓笔对话框”

The plunger in the fuel injector pump, usually operated by a (), is driven up and down when working.

A. crankshaft
B. camshaft
C. piston rod
D. rack and pinio

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