客运索道是指利用动力驱动、柔性绳索牵引箱体等运载工具运送人员的机电设备，包括客运...

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【单选题】

客运索道是指利用动力驱动、柔性绳索牵引箱体等运载工具运送人员的机电设备，包括客运架空索道、客运缆车、客运拖牵索道等。客运索道的运行管理和日常检查、f修是其安全运行的重要保障。下列客运索道安全运行的要求中，正确的是（）。

客运索道每天开始运送乘客之前进行三次试运转

单线循环固定抱索器客运架空索道一般情况下不允许夜间运行

单线循环式索道上运载工具间隔相等的固定抱索器，应按规定的时间间隔移位

客运索道线路巡视工至少每周进行一次全线巡视

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【单选题】共集电极放大电路又称为射极输出器,它的输出阻抗( )

低

高

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【判断题】由于共集电极放大电路交流从发射极输出,所以又称其为射极输出器。

正确

错误

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【简答题】It was Sunday and Tom was staying home. After breakfast he went out into the garden and played quietly by himself. There were no kids around and he was used to (习惯于) playing alone quietly. He played w...

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【单选题】植物幼茎上分布着许多小孔,称为( )

纹孔

皮孔

气孔

穿孔

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【简答题】请将课本P138页的单选题答案依次填入

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【判断题】共集电极放大电路它是由基极输入信号、发射极输出信号的,所以称为射极输出器。集电极是输入回路与输出回路的公共端,所以又称为共集电路。

正确

错误

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【简答题】It was Sunday and Tom was staying home. After breakfast he went out into the garden and played quietly by himself. There were no kids around and he was used to playing alone quietly. He played with Bo...

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【判断题】单管共集电极放大电路又称为射极输出器或电压跟随器。

正确

错误

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【单选题】This kind of animal is able to protect itself from danger in many years. ________, the colouring of its hide makes it almost invisible when it is feeding in the shadow of trees.

First at all

First of all

In all

At all

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【单选题】植物幼茎、叶表皮上分布着许多小孔．称为( )。

纹孔

皮孔

气孔

穿孔

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