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【多选题】
关于桥形(外桥和内桥)接线,以具有两回路电源进线和两变压器的变电所为例,下列说法中正确的是( )。
A.
以分段单母线为基准，为减少断路器数量和节约建设投资，分别用隔离开关
B.
进线断路器或主变压器回路断路器，即构成桥形接线。原母线分段回
C.
称为“桥”。桥上仍设置断路器的，称为“断路器桥，桥上仅设隔离开关
D.
称为“隔离开关桥”
E.
用隔离开关取代主变压器回路断路器、进线回路仍保留断路器的，叫内桥。
F.
当人站在主变压器处且面对进线时，桥位于断路器的内侧（距人较近）
G.
用隔离开关取代进线断路器、主变压器回路仍保留断路器的，叫外桥。因为
H.
站在主变压器处且面对进线时，桥位于断路器的外侧（距人较远）
I.
就供电可靠性和操作方便而言，桥形接线逊色断单母线，但能节约投资
J.
少断路器数量
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【单选题】[问题10] 有关类Demo,哪句描述是正确的? public class Demo extends Base{ private int count; public Demo(){ System.out.println("A Demo object has beencreated"); } protected void addOne() {count++; } } (难度系数:2)
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【单选题】— Tom hasn't turned up yet. He might have got lost. — No, he ________. His car has got a GPS. [    ]
A.
must not have got lost
B.
wouldn't have got lost
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A.
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in order that
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【单选题】He ____ the truth. Otherwise he might have known it was Tom who had taken his place.
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should have been told
B.
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C.
couldn't have been told
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【简答题】碳酸氢钠俗名( ),是一种细小的白色( ),受热会分解产生( )气体。
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【单选题】Eagerly and anxiously Tom Sawyer pressed forward by the light of the pocket electric lamps. He was obsessed by two thoughts-what he might find and the necessity for aiding in the rescue of the rivals.
A.
driven
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haunted
C.
affected
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disturbed
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A.
乳酸
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乙酸
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丙酮酸
D.
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【单选题】_____ he might, Tom couldn’t get out of the difficulty.
A.
Try as
B.
Tried as
C.
Though try
D.
As try
查看完整题目与答案
【单选题】[问题10] 有关类Demo,哪句描述是正确的? public class Demo extends Base{ private int count; public Demo(){ System.out.println("A Demo object has beencreated"); } protected void addOne() {count++; } } (难度系数:2)
A.
当创建一个Demo类的实例对象时，count的值为0
B.
当创建一个Demo类的实例对象时，count的值是不确定的
C.
超类对象中可以包含改变count 值的方法
D.
Demo的子类对象可以访问count
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