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【判断题】
while 后括号里的表只能是逻辑或关系表。A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】作业中开放的调车信号机临时故障（熄灭）时的应急处理方法是（）。
A.
调车长应立即向司机显示停车信号停车
B.
与信号操纵人员联系，问明信号关闭原因
C.
信号机故障，应向信号员报告列车所处位置，本次运行停车位置
D.
运行中应不间断确认前方进路开通情况，遇有异常及时采取措施
【单选题】The author is grateful to the World Wide Web program just because of the following EXCEPT
A.
it brings much convenience and saves a lot of time.
B.
it helps to save much money for the students who are usually poor.
C.
it enables the author to finish the paper in time after the flood.
D.
it enables the students to keep in touch with their pals and relatives.
【单选题】The author is grateful to the Word Wide Web program just because of the following EXCEPT
A.
it brings much convenience and saves a lot of time.
B.
it helps to save much money for the students who are usually poor.
C.
it enables the author to finish the paper in time after the flood.
D.
it enables the students to keep in touch with their pals and relatives.
【单选题】You have just installed a new web server on the Ezonexam network. You are required to ensure that the web server is accessible from the Internet. The network uses private addressing, so an IP-to-regis...
A.
The keyword overload is missing from the command.
B.
The NAT pool must be defined first.
C.
An access list must be defined to create static NAT translations.
D.
The inteces must be configured for NAT.
E.
None of the above
【单选题】下列横线处应填写的语句是（ ）。 import JaVa．awt．*； public class FirstFrame. extends Frame{ public static void main(String args[]){ FirstFrame. fr=new FirstFrame('First container!')； fr．setsize(240，240)； fr．setBackgr...
A.
fr．setVisible(true)
B.
fr．setVisible(false)
C.
fr．setFrame(true)
D.
fr．setmyFrame(true)
【单选题】宁天城际洗车表示灯未纳入信号联锁监控，为洗车机控制室单独控制，采用红、绿两显示，红灯，禁止机车车辆通过，（）除外；绿灯，在得到洗车机控制室值班人员的同意后方可越过。
A.
临时停靠
B.
淋雨试验
C.
端部清洗
D.
列车检测轨道
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