早期电视机接收的频道为1—12频道(48.5—223.5 MHz),全频道电视机

题型:问答题

问题:

早期电视机接收的频道为1—12频道(48.5—223.5 MHz),全频道电视机所接收的频率除了1—12频道外,还包括13—56频道(470—862 MHz),试求早期电视机和全频道电视机所接收的无线电波的波长范围.

考点:电磁波
题型:问答题

患者,女,声音嘶哑多年,每因多讲话后症状加重,查双声带暗红,边缘增厚,闭合不全,并有干咳少痰,颧红,虚烦少寐,腰膝酸软,手足心热,舌红少苔,脉细数。

首选方剂为:()

A.养阴清肺汤

B.六味地黄汤

C.百合固金汤

D.补中益气汤

E.会厌逐瘀汤

题型:问答题

阅读下面这首诗,完成题目。

苏氏别业

祖咏

别业居幽处,到来生隐心。

南山当户牖,澧水映园林。

竹覆经冬雪,庭昏未夕阴。

寥寥人境外,闲坐听春禽。

(1)高步瀛在《唐宋诗举要》中以“极力出奇”来评价该诗颔联和颈联两联。请从写景的角度分析这两联是如何“出奇”的。

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(2)诗中表现了诗人怎样的形象?请结合诗歌内容,作简要分析。

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题型:问答题
Many years ago, I owned a service station and roadhouse on the main road between Melbourne and Adelaide.
One very cold, wet night at about 3:30 a.m., there was a  36  on the front door of our house. A young man, wet from  37   to toe, explained that he had   38   out of petrol about 30 km up the road. He had left his pregnant wife and his two children   39   at the car and said that he would hitchhike(搭便车) back.
Once I had   40    a can with petrol, I took him back to his car where his two-year-old and four-year-old children were both   41 , saying that they were cold. Once the car had started, I suggested that he   42  me back.
Before leaving, I had turned the heater  43   in the roadhouse, so that when we went in, it was nice and  44   .While the little ones played and ran  45   ,I prepared bread and butter for the children, and hot chocolate for the  46  .
It was about 5 a.m. before they   47   .The young fellow asked me how much he   48  me and I told him that the petrol pump had   49  $15.He offered to pay “call-out fee”, but I wouldn’t accept it.
About a month later, I received a  50   from Interstate, a large bus company that we had been trying to  51  to stop off at our roadhouse for a long time. It   52   out that the young fellow I had helped was its general manager, the most  53   person in the company.
In his letter, he thanked me again and   54  me that, from then on, all their buses would stop at my service station. In this  55  ,a little bit of kindness was rewarded with a huge amount of benefits.
小题1:
A.kickB.hitC.beatD.knock
小题2:
A.fingerB.shoulder C.headD.hand
小题3:
A.drivenB.usedC.comeD.run
小题4:
A.awayB.behindC.overD.out
小题5:
A.suppliedB.pouredC.equippedD.filled
小题6:
A.sleepingB.cryingC.quarrellingD.fighting
小题7:
A.allowB.ringC.leadD.follow
小题8:
A.onB.offC.inD.over
小题9:
A.neatB.hotC.warmD.attractive
小题10:
A.aroundB.insideC.nearbyD.along
小题11:
A.driversB.guestsC.customersD.adults
小题12:
A.leftB.arrivedC.ateD.disappeared
小题13:
A.gaveB.paidC.owedD.offered
小题14:
A.appearedB.exhibitedC.calculatedD.shown
小题15:
A.callB.letterC.checkD.notice
小题16:
A.getB.forceC.requireD.hope
小题17:
A.pointedB.turnedC.workedD.found
小题18:
A.generousB.successfulC.seriousD.powerful
小题19:
A.praisedB.persuadedC.informedD.convinced
小题20:
A.lessonB.businessC.aspectD.case
题型:问答题

利用国产替代设备的重置成本推算进口设备重置成本一般是在( )的前提下进行的。

A.无进口设备的现行CIF

B.关税税率变化很大

C.无国外替代设备的现行FOB

D.外汇汇率变化很大

题型:问答题

以下哪些是小夹板的性能()

A.可塑性

B.弹性

C.韧性

D.可透射线

E.质地轻便

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