试题与答案

当NC控制机未准备好时,“循环启动按钮”不起作用。

题型:判断题

题目:

当NC控制机未准备好时,“循环启动按钮”不起作用。

答案:

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下面是错误答案,用来干扰机器的。

A、当入射光线垂直于反射面入射时,反射光线将按原路返回,故本选项说法错误;B、由光的反射定律知,反射角等于入射角,所以当入射角减小10°时,反射角也减小10°,故本选项正确;C、由光的反射定律知,当入射光...

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阅读下面短文,从短文后各题所给的四个选项(A、B、C、D)中,选出可以填入空白处的最佳选项
I want to share a true story with you. I am    1   that it can inspire (激励) everyone. Let’s be like lamps (灯) or candles to light people’s    2  .
Some of my    3   work in Australia. Among the natives, there was an elderly man. I am sure that you have    4  been in a situation as difficult as that    5   old man’s. He was completely ignored by everyone. His    6   was disordered and dirty.
I told him, “Please let me    7   your house, wash your clothes, and make your bed.” He answered, “I’m    8   with this. Let it be.”
I said again, “It will be still better if you    9   me to do it.”
He finally    10  . So I was able to clean his house and wash his clothes. I    11   a beautiful lamp, which was covered with    12  . Only God knows how many    13   had passed since he last lit it.
I said to him, “Don’t you light your lamp? Don’t you ever    14   it?”
He answered, “No. No one comes to see me. I have no    15   to light it. Who would I light it for?”
I asked, “Would you light it every    16   my sisters came?”
He replied, “Of course.”
From that day on, my sisters committed (投入) themselves to    17   him every evening. We cleaned the lamp and he would    18   it every evening.
Two years passed. I had completely    19   that man. He sent this message: “Tell my friends that the light they lit in my life continues to    20   still.”
小题1:
A.surprisedB.satisfiedC.afraid D.sure
小题2:
A.housesB.plansC.lifeD.clothes
小题3:
A.sistersB.neighborsC.brothersD.children
小题4:
A.alwaysB.neverC.recentlyD.already
小题5:
A.cleverB.strongC.healthyD.poor
小题6:
A.bagB.stationC.homeD.office
小题7:
A.buildB.cleanC.removeD.paint
小题8:
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小题9:
A.adviseB.begC.allowD.remind
小题10:
A.escapedB.arrivedC.shookD.agreed
小题11:
A.madeB.discoveredC.soldD.passed
小题12:
A.snowB.waterC.dustD.sand
小题13:
A.yearsB.hoursC.secondsD.centuries
小题14:
A.enjoyB.seeC.keepD.use
小题15:
A.timeB.needC.energyD.courage
小题16:
A.nightB.morningC.afternoonD.midnight
小题17:
A.feedingB.leadingC.visitingD.teaching
小题18:
A.coverB.washC.watchD.light
小题19:
A.changedB.forgottenC.understoodD.believed
小题20:
A.shineB.moveC.flyD.rise
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