试题与答案

设备点检的定义、目的以及点检管理的实质?

题型:问答题 简答题

题目:

设备点检的定义、目的以及点检管理的实质?

答案:

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题型:完形填空
完形填空(共15小题;每小题1分,满分15分)
Wings of Angel 
I used to hate myself because I wasn’t “normal”. Everyone else could play on the monkey bars and ride on a bicycle, but not   36 . I had a severe spinal cord disorder (脊髓病) and I knew I would always be much   37  than others.
I hated going to school and I hated people   38  at me. I hated seeing others smiling broadly and standing straight and tall. And most of all, I hated looking in the   39  and seeing an ugly hunchback (驼背).
My friends found me   40  because I didn’t let others get close to me. I thought I was going to go on like this for the rest of my life   41  Angela appeared.
That afternoon, I was sitting by myself in a corner of the school — a spot where no one would   42  me. That’s when I first heard her voice.
“Hi. Can I sit down?”
I raised my head and there she was, with an irresistible smile on her round face.
“What are you looking at?” she asked.
“Ants.”
“What are they doing?”
“No idea.”
“I bet they’re playing games and making friends. Don’t you think so?”
That was how our   43  started and it didn’t stop. We talked about everything under the sun—the ants, the clouds, my little niche (处境) — until it was sunset.
Then suddenly, she saw my   44 . She just stared.
My heart sank. What I feared most had happened and I knew for sure she would   45  me now.
She stood up, pointed at my back and said, “I know   46  your back is hunched.”
I closed my eyes like a criminal waiting to be sentenced. I begged in my heart for her to   47 , but she just kept on going. “I know what you’ve got in there. Do you?”
“No,” I answered   48 .
She bent and whispered in my ears.
“Your back is hunched because you’ve got a pair of wings from the angels.”  
I was   49 . I looked into her eyes and her kindness touched my heart. From that day on, I started to learn to   50  myself because I have the wings of an angel and a kind-hearted friend.
小题1:
A.themB.itC.meD.her
小题2:
A.sadderB.shorterC.weakerD.slower
小题3:
A.lookingB.smilingC.aimingD.glaring
小题4:
A.streetB.sunC.cornerD.mirror
小题5:
A.distantB.disappointedC.hopelessD.unlucky
小题6:
A.afterB.whileC.sinceD.until
小题7:
A.disturbB.seekC.comfortD.ignore
小题8:
A.games B.performanceC.conversation D.competition
小题9:
A.faceB.backC.eyesD.wings
小题10:
A.look up toB.catch up withC.look down uponD.put up with
小题11:
A.that B.howC.whetherD.why
小题12:
A.relax B.leave C.stop D.forbid
小题13:
A.excitedlyB.weaklyC.proudlyD.firmly
小题14:
A.astonishedB.ashamedC.annoyedD.upset
小题15:
A.controlB.like C.forgiveD.hate
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题型:问答题

如图所示,可视为质点的三物块A、B、C放在倾角为30°、长L=2m的固定斜面上,物块与斜面间的动摩擦因数μ=

7
3
80
,A与B紧靠在一起,C紧靠在固定挡板上,三物块的质量分别为mA=0.80kg、mB=0.64kg、mC=0.50kg,其中A不带电,B、C的带电量分别为qB=+4.00×l0-5C.qC=+2.00×l0-5C.且保持不变,开始时三个物块均能保持静止且与斜面间均无摩擦力作用.如果选定两点电荷在相距无穷远处的电势能为0,则相距为r时;两点电荷具有的电势能可表示为EF=k
q1q2
r
,现给A施加一平行于斜面向上的力F,使A在斜面上作加速度a=1.5m/s2的匀加速直线运动,经过时间t0,力F变为恒力,当A运动到斜面顶端时撤去力F.已知静电力常量k=9.0×l09N•m2/C2,g=10m/s2.求:

(1)未施加力F时物块B、C间的距离:

(2)t0时间内A上滑的距离;

(3)t0时间内库仑力做的功;

(4)力F对A物块做的总功.

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