质量为500克的铁壶中放有3千克水,把这一壶20оC的水烧开(一标准大气压),问

题型:问答题

问题:

质量为500克的铁壶中放有3千克水,把这一壶20оC的水烧开(一标准大气压),问:

(1)需要吸收多少热量.

(2)若用效率为40%的炉子加热,烧开这壶水需燃烧多少克烟煤?(铁的比热容为0.46×103焦/(千克•℃),无烟煤的燃烧值为3.4×107焦/千克)

考点:热值热量的计算
题型:问答题

男性,12岁。1个月前进食不慎,自觉食物呛入气管,此后出现频繁咳嗽,咳黄脓痰。曾发热,胸部平片:未见明显异常()。

A.水泡音

B.哮鸣音

C.胸膜摩擦音

D.Velcro啰音(捻发音)

E.鼾音

题型:问答题

联合国在1992年的第47届联合国大会举行了老龄问题特别会议,讨论通过了《老龄问题宣言》,宣言规定哪一年定为国际老人年

A.1996

B.1997

C.1998

D.1999

E.2000

题型:问答题

患者,男,10岁,颏部发育差,唇前突闭合不全,面下1/3高度偏大,有咬下唇习惯,覆盖8mm,磨牙完全远中关系,前牙深覆,ANB7°,上前牙前突,牙列无拥挤。

目前矫治首选下列哪项方案()

A.常规固定正畸治疗

B.骨骼的矫形治疗

C.正颌外科

D.生长停止后口腔正畸与正颌外科

E.以上都不是

题型:问答题
Night after night, my mother came to my bed, even long after my childhood years. She would   21 down and push my long hair out of the way, and then kiss my forehead. I don’t remember when it first started  22 me-her hands pushing my hair that way, for they felt work-worn and rough  23 my young skin. Finally , one night, I shouted out at her, “Don’t do that any more-your hands are too rough!” she made no  24 and left quietly. But never again did my mother do it with that familiar expression of her  25 .
With the passing years, my   26 returned to that night time after time. By then I   27 my mother’s hands and her goodnight kiss. Sometimes the incident seemed very  28 , sometimes far away, but always it was  29 in the back of my mind.
The years have passed, and I’m not a little girl any more. Mom is in her seventies, and those hands I once  30 to be so rough are still doing things for me and my family.
Now, Mom no longer has Dad and lives  31 . One night on Thanksgiving Eve, I found myself  32 to her house to spend the night with her. As I slept in the bedroom of my youth, a familiar hand hesitantly ran across my face to  33 the hair from my forehead. Then a   34 , ever so gently , touched my forehead. I burst into tears.
In my memory, thousands of times, I   35 the night my young voice complained. Catching Mom’s hand in hand, I told her how  36 I was for that night. I thought she’d remember  37 I did. But Mom didn’t know what I was talking about. She had already forgotten and   38 long ago.
That night, I fell asleep with a new  39 for my gentle mother and her caring hands. And the guilt that I had carried around for so long was   40 to be found.
小题1:
A.lieB.bendC.lookD.fall
小题2:
A.annoyingB.astonishingC.delightingD.disappointing
小题3:
A.alongB.aboveC.againstD.aside
小题4:
A.replyB.promiseC.requestD.agreement
小题5:
A.pityB.sadnessC.apologyD.love
小题6:
A.viewsB.opinionsC.spiritsD.thoughts
小题7:
A.missedB.forgotC.heldD.shook
小题8:
A.strangeB.closeC.seriousD.common
小题9:
A.stressedB.existedC.hiddenD.exposed
小题10:
A.expectedB.changedC.remindedD.complained
小题11:
A.yetB.awayC.aloneD.long
小题12:
A.drawnB.carriedC.movedD.stayed
小题13:
A.cutB.washC.brushD.take
小题14:
A.tearB.kissC.pressD.hand
小题15:
A.returnedB.rememberedC.realizedD.recalled
小题16:
A.sorryB.happyC.angryD.nervous
小题17:
A.whenB.howC.whyD.as
小题18:
A.disappearedB.forgivenC.apologizedD.abandoned
小题19:
A.imaginationB.inspirationC.decorationD.appreciation
小题20:
A.stillB.soonC.nowhereD.anyhow
题型:问答题

综合性货场按作业量大小可分为()。

A、特大型货场

B、大型货场

C、中型货场

D、小型货场

E、货区

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