交流发电机控制板内二极管cr601用来() A.保护继电器ecr触点 B.保护控制板

题型:单项选择题

问题:

交流发电机控制板内二极管cr601用来()

A.保护继电器ecr触点

B.保护控制板

C.保护励磁线圈

D.都不是

考点:民用航空器维修执照考试CCAR135CCAR
题型:单项选择题

在自然界中最高等、种类最多的植物是[ ]

A.藻类植物                  

B.苔藓植物  

C.种子植物                  

D.蕨类植物

题型:单项选择题

有关城市规划的叙述,正确的是[ ]

A、城市规划是城市目前各项建设的综合部署

B、城市规划只在一定时期有效,不必考虑太长远

C、城市规划只对大城市经济活动和环境保护有利,中小城市不用考虑

D、城市规划是城市建设和管理的依据

题型:单项选择题
I was nineteen years old the first time I saw my own true character.
My trip to and from work each day included a ten-minute walk through the heart of downtown, where the   36  often gathered. Like most busy citizens, I learned to   37  those nameless faces. When it came to homeless beggars, my   38  life experience had led me to one   39  that they are on the street because they choose to be, probably due to alcohol or drugs.
It was an extremely cold day. When I passed the groups of beggars as usual, I heard a shaky voice target me. 
“Spare some change?” he asked.
I didn’t even   40  looking up at his nameless face. I briefly   41  him walking into a liquor store and buying whiskey with the money we spared him. Like most teenagers, it took me only moments to  42  him.
“I have no money on me,” I said quickly.
Looking back now, I feel as if God had set out that day to teach me a lesson. And God   43 . Just a few feet past him, I managed to find the only ice patch on the sidewalk. I   44  and landed heavily on my right knee. The   45  was almost killing me as I tried to get up. Then I heard a shaky voice only inches above me.
“Are you all right?” he asked.
I knew immediately this was the man I had just rushed past. Even in pain, I   46  took a quick moment to sniff for the smell of alcohol on his breath. There was none. He wasn’t   47 . I saw the   48  in his eyes.
I  49 to get to my feet. He held my arm as I walked difficultly to the nearby bus stop.
“My name is Mike,” he said. “That’s quite a fall you took, and you really need to get it checked by a doctor,” he said with deep   50 .
“This bus goes past the hospital,” I said.
Mike paused, and a look of sudden   51  crossed his face. He reached into his pocket and pulled out a small cup. He took out all the change and held it out toward me.
“I think there’s just enough here for you to take the bus,” he said.
I was highly embarrassed as I remembered my   52 . I reached for my purse and took out my change. At least ten dollars. I offered Mike all my change.
“Thank you and take care of yourself,” I said. Both of us knew that few minutes earlier I couldn’t have   53  what happened to him.
Mike held his cup tightly,   54  it as if it were the first gift he had ever received.
A half cup of change seemed too small a gift for the man who gave a   55  to every nameless face I’ve ever seen.
小题1:
A.doctorsB.beggarsC.citizensD.sellers
小题2:
A.pityB.observeC.forgiveD.ignore
小题3:
A.limitedB.painfulC.meaningfulD.rich
小题4:
A.factB.ruleC.assumptionD.suggestion
小题5:
A.mindB.botherC.avoidD.bear
小题6:
A.imaginedB.followedC.noticedD.heard
小题7:
A.judgeB.stopC.teaseD.blame
小题8:
A.signedB.succeededC.respondedD.approached
小题9:
A.skippedB.dashedC.slippedD.hesitated
小题10:
A.regretB.scareC.coldD.pain
小题11:
A.stillB.everC.yetD.also
小题12:
A.honestB.reliableC.drunkD.shabby
小题13:
A.greedB.surpriseC.sorrowD.sympathy
小题14:
A.failedB.struggledC.hurriedD.chose
小题15:
A.reliefB.satisfactionC.understandingD.concern
小题16:
A.confusionB.realizationC.excitementD.sadness
小题17:
A.lieB.injuryC.promiseD.experience
小题18:
A.knownB.predictedC.caredD.accepted
小题19:
A.treasuringB.protectingC.makingD.showing
小题20:
A.lessonB.nameC.chanceD.fortune
题型:单项选择题

本题中所有的气体体积均为标准状况下的体积。A、B为两种单质,常温下均是固体。在元素周期表中A、B同周期且原子半径A>B。分别取三份质量为1.52 g的A、B的混合物(粉末)进行如下实验:

a.向第一份试样中加入过量的盐酸,充分反应后,放出0.896 L气体,还剩下0.56 g的残渣;

b.向第二份试样中加入过量的10%的NaOH溶液,充分反应后,放出0.896 L气体,还剩下0.96 g的残渣;

c.将第三份试样隔绝空气加强热后,生成一种固体,冷却后,再加入足量的盐酸,该固体全部溶解,产生x L气体。

(1)单质B是__________________。

(2)混合物中A的质量分数是__________________。

(3)写出实验c中有关反应的化学方程式并计算x的值。

题型:单项选择题

玻璃管式温度计是()温度计。

A、热电偶

B、膨胀式

C、压力式

D、热电阻

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