试题与答案

当近端发生永久性三相短路时,自并励发电机的短路电流不会衰减到零,后备保护能可靠动作。

题型:判断题

题目:

当近端发生永久性三相短路时,自并励发电机的短路电流不会衰减到零,后备保护能可靠动作。

答案:

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题型:解答题

某公司计划将研发的两种新产品A和B进行精加工后再投放市场,根据资质考查,决定由甲、乙两个工厂分别加工A、B两种产品,两厂同时开工,已知甲、乙两厂每天能生产的A、B两种产品共21件,甲厂3天生产的A种产品与乙厂4天生产的B种产品数量相同。

(1)求甲、乙两个工厂每天分别能加工多少件新产品?

(2)如果A种产品的出厂价为每件200元,B种产品的出厂价为每件180元,信义超市需一次性购买A、B两种产品共100件,若信义超市按出厂价购买A、B两种产品的费用超过19000元而不到19080元.请你通过计算,帮助信义超市设计购买方案。

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题型:完形填空
The sun was shining when I got on No.151 Bus. We passengers sat jammed together in heavy clothes. No one spoke. That’s one of the         rules.          we see the same faces every day, we prefer to       behind our newspapers. People who sit so close together are using those thin sheets of newsprint to keep their         .
As the bus came near the Mile, a       suddenly rang out “       !This is your driver speaking.” We looked at the back of the driver’s head. “Put your papers down. All of you.” The      came down. “Now, turn and face the person next to you. Go         .”
Surprisingly we all did it. Still no one smiled. I faced an older woman, her head wrapped in a red scarf(围巾).I saw her       every day. Our eyes met We waited for the next       from the driver. “Now repeat after me. Good morning neighbor!”
Our voice were       .For many of us, these were the         words we had spoken that day. But we said them together, like       ,to the strangers beside us. We couldn’t help       .There was the feeling of relief(解脱), that we were not being held up(抢劫). But more, there was the sense of ice being       . “Good morning ,neighbor.” It was not so        after all. Some of us repeated it, others shook hands ,many laughed. The bus driver said nothing more. He didn’t        to. Not a single newspaper went back up. I heard laughter, a warm sound I had never heard before in        .
When I reached my stop, I said         to my seatmate, and then jumped off the bus. That day was        off  better than most.
小题1:
A.unwrittenB.strictC.busD.city
小题2:
A.AsB.BecauseC.WhenD.Although
小题3:
A.readB.sitC.talkD.hide
小题4:
A.waysB.methodsC.respectD.distance
小题5:
A.messageB.warningC.suggestionD.voice
小题6:
A.AttentionB.MindingC.HelpD.Listen
小题7:
A.papersB.passengersC.driverD.tears
小题8:
A.onB.roundC. aheadD.down
小题9:
A.stillB.nearlyC.evenD.hardly
小题10:
A.turnB.talkC.orderD.remark
小题11:
A.loudB.neatC.slowD.weak
小题12:
A.firstB.lastC.bestD.only
小题13:
A.passengersB.citizensC.patientsD.schoolchildren
小题14:
A.shoutingB.cryingC.smilingD.wondering
小题15:
A.formedB.heatedC.brokenD.frozen
小题16:
A.sadB.hardC.ordinaryD.shy
小题17:
A.needB.wantC.likeD.begin
小题18:
A.my lifeB.Bus No.151C.publicD.other words
小题19:
A.good morningB.good-byeC.helloD.thanks
小题20:
A.startingB.seeingC.takingD.turning
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