问题 问答题 简答题

什么是整组传动实验?试验方法是什么?

答案

参考答案:

整组传动实验是指自装置的电流、电压、二次回路端子的引人端子处或从变流器一次侧,向被保护设备的所有装里通人模拟电压、电流量,以检验各装置在故障过程中动作情况。它是检查继电保护装置接线是否正确合理,工作是否可靠的最有效方法。过电流元件应用突然通人电流的方法进行检验;阻抗元件应将电压由正常运行值突然下降,而电流由零值突然上升或自负荷电流变为短路电流的方法进行检验。通人交流工频电源前,应先断开装置交流回路接地点。

完形填空
完形填空(共20小题;每小题1分,满分20分)
请认真阅读下面短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。
Stefan and Erika Svanstrom on a four-month honeymoon were hit by several natural disasters, including the Australian floods, Christchurch earthquake and Japanese tsunami.
The    36   couple left Sweden on December 6 and were    37   caught in Munich, Germany, due to one of Europe’s worst snowstorms.
Later, they flew on to Australia which then    38   with one of the most terrible hurricanes in the nation’s history. From there, the couple,    39  , were forced to    40   for 24 hours on the floor of a shopping centre with 2500 others.
“Trees were being    41   and big branches were scattered across the streets,” Stefan told Sweden’s Expressen newspaper. “We    42   escaped”
The couple then flew to Christchurch, New Zealand.    43   their arriving, a massive earthquake    44   magnitude 6.3 hit the city on February 22.
Erika said “We could not visit the city since it was completely in    45  , so instead we travelled around before going to Japan.” But days after the Svanstroms arrived, Tokyo was    46   by Japan’s largest earthquake    47   records began. “The trembling was horrible and we saw roof debris (碎片) fly off the buildings,” Mr. Svantrom said. “   48   seemed the buildings were swaying    49  .”
The family returned to Sweden on March 29 after a(n)    50   calmer visit to their last destination China.
But Mr. Svanstrom, who also survived the very tsunami    51   hit Southeast Asia in 2004, said “I know marriages have to experience some    52  , but I think we have    53   most of them.” ,   54   that the marriage had become strong.
“We’ve certainly experienced    55   our fair share of catastrophes, but the most important thing is that we’re together and happy.” said the couple.
小题1:
A.new-marriedB.newly-marryC.newly-marriedD.new-marry
小题2:
A.finallyB.eventuallyC.graduallyD.immediately
小题3:
A.metB.facedC.hitD.come
小题4:
A.in vainB.in panicC.in sorrowD.in depression
小题5:
A.hideB.stayC.remainD.shelter
小题6:
A.taken overB.turned overC.got overD.knocked over
小题7:
A.nearlyB.narrowlyC.almostD.easily
小题8:
A.AtB.WithC.OnD.For
小题9:
A.measuringB.is measuredC.measuresD.measured
小题10:
A.messB.orderC.chaosD.control
小题11:
A.effectedB.destroyedC.shakenD.suffered
小题12:
A.whenB.whileC.asD.since
小题13:
A.ItB.ThereC.ThatD.What
小题14:
A.in and outB.here and thereC.backwards and forwardsD.back and forth
小题15:
A.prettyB.fairlyC.muchD.even
小题16:
A.whichB.asC.thatD.what
小题17:
A.trialsB.tricksC.tripsD.triangles
小题18:
A.looked throughB.put throughC.come throughD.got through
小题19:
A.addedB.addingC.added toD.adding to
小题20:
A.rather thanB.other thanC.more thanD.less than
多项选择题