如果把一个24V的电源正极接地,则负极电位是-24V。()

题型:判断题

问题:

如果把一个24V的电源正极接地,则负极电位是-24V。()

考点:农网配电营业工考试农网配电营业工中级工农网配电营业工中级工题库
题型:判断题
In a land far away, once upon a time there was great poverty (贫困),and only the rich could manage without great _36. Three of those rich men and their servants were_37_together on a road when they came to a very_38_village.
The first could not stand seeing the poverty, _39 he took all the gold and jewels from his wagons (四轮载重马车) and shared 40 out among the villagers. He wished them all the best of luck, and he left.
The second rich man ,seeing the _41 situation, stopped for a short time and gave _42 all his food and drink, since he _43  see that money would be of little _44 to them. He made sure that they each 45their fair share and would have enough food to _46 for some time . Then, he left.
The third rich man, on seeing such poverty, _47  and went straight through the _48  without stopping. The two other rich men saw this from a distance and commented with each other 49 the third rich man lacked sympathy. It was _50  that they themselves had been there to offer help.
However, three days later, they 51the  third rich man ,who was coming in the opposite direction . He was 52  travelling quickly, but his wagons,  53  the gold and valuables they had been  54  ,were now full of farming tools and bags of  55 .He was rushing back to help them out of poverty.
小题1:
A.lossB.expectationsC.successD.problems
小题2:
A.standingB.travellingC.gatheringD.running
小题3:
A.farawayB.poorC.differentD.ancient
小题4:
A.unlessB.becauseC.soD.if
小题5:
A.themB.anythingC.nothingD.those
小题6:
A.curiousB.worryingC.dangerousD.puzzling
小题7:
A.the villagersB.his servantsC.the othersD.the rest
小题8:
A.couldB.mightC.shouldD.must
小题9:
A.interestB.concernC.useD.attraction
小题10:
A.returnedB.gainedC.offeredD.received
小题11:
A.remainB.lastC.supplyD.share
小题12:
A.turned backB.set outC.showed offD.speeded up
小题13:
A.villageB.landC.fieldD.road
小题14:
A.whetherB.howC.whereD.when
小题15:
A.goodB.certainC.trueD.strange
小题16:
A.welcomedB.metC.acceptedD.persuaded
小题17:
A.stillB.alreadyC.alwaysD.indeed
小题18:
A.exceptB.instead ofC.apart fromD.along with
小题19:
A.loadingB.treasuringC.carryingD.earning
小题20:
A.foodB.jewelsC.moneyD.seeds
题型:判断题

钩藤入汤剂宜()。

A.先煎

B.后下

C.包煎

D.另煎

E.烊化

题型:判断题

有10人乘木筏渡河,平均每人的质量是60千克,木筏由若干根体积为0.1米3的圆木组成。若ρ=0.4×103千克/米3,此木筏至少需要_________根圆木组成。

题型:判断题

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题型:判断题

语音信道带宽为4000Hz,调制为4种码元,根据奈奎斯特定理,信道波特率为(1),数据速率为(2)

2()

A.4kbps

B.16kbps

C.32kbps

D.64kbps

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