问题 选择题

杭州(30°N)某同学对传统的太阳能热水器进行改造:将支架改造成可活动的形式。请回答题。

小题1:为了充分利用太阳能,尽可能使一年内正午太阳光线与集热板保持垂直,集热板与地面夹角的调整幅度为

A.23° 26′

B.30°

C.46° 52′

D.60°小题2:一年中,活动支架最短的日期是

A.春分日

B.夏至日

C.秋分日

D.冬至日

答案

小题1:C

小题2:B

题目分析:

小题1:正午太阳高度最大值出现在夏至日(直射北回归线),最小值在冬至日(直射南回归线)。为了充分利用太阳能,尽可能使一年内正午太阳光线与集热板保持垂直,集热板与地面夹角的调整幅度为46° 52′。

小题2:α角越大,支架越长;α角越小,支架越短。α角与正午太阳高度是互余的关系,要使支架一年中最短,正午太阳高度最大,杭州(30°N)最大正午太阳高度出现在夏至日。

点评:本题难度适中。以杭州(30°N)某同学对传统的太阳能热水器进行改造为材料,要求学生熟练掌握正午太阳高度的变化及应用。

完形填空
Charles R. Drew was a medical student at Columbia University in New York. Before he graduated, he wrote an article __36___ blood bank, that is, the storing of blood. Up till then, a lot of people had died from loss of blood __37___ there was no blood bank.
When the United States entered the Second World War, it became __38___ to set up blood banks. Dr Drew became _39___ of the Red Cross’s first blood bank. When the Red Cross __40___ blood banks to collect and store blood for men __41__ in battle, black American gave blood along with the whites. At ___42__ their blood was not accepted. Later blood from the blacks was ___43___ but was stored in a __44___ place from “white” blood. Although the best doctors __45___ that there was _46___ difference at all between the blood of blacks and whites, the Red Cross, with the support of the government, __47___ to separate black blood from white blood.
After the war, Dr Drew was ___48__ from Washington with three other doctors to attend a medical meeting in a southern state. In northern Carolina their car went __49___ a ditch(深沟)and Dr Drew was _50___ hurt. He had lost __51__ blood by the time a passing car took him to the __52___ hospital. But they were stopped at the gate of the hospital. “__53__him to the hospital for blacks.” No matter __54___ they said, they could not get into the hospital. They had to take him to the __55___ hospital, but on the way Dr Drew died because he had lost too much blood.
小题1:
A.ofB.onC.forD.in
小题2:
A.thoughB.ifC.becauseD.and
小题3:
A.possibleB.impossibleC.unimportantD.necessary
小题4:
A.visitorB.headC.receiverD.supporter
小题5:
A.startedB.expectedC.promisedD.forbade
小题6:
A.diedB.killedC.woundedD.fighting
小题7:
A.mostB.leastC.firstD.last
小题8:
A.receivedB.acceptedC.lostD.found
小题9:
A.goodB.coolC.hotD.separate
小题10:
A.discoveredB.inventedC.insistedD.regretted
小题11:
A.littleB.muchC.someD.no
小题12:
A.beganB.refusedC.stoppedD.continued
小题13:
A.drivingB.walkingC.arrivingD.running
小题14:
A.fromB.intoC.alongD.off
小题15:
A.hardlyB.nearlyC.badlyD.not
小题16:
A.someB.littleC.allD.much
小题17:
A.biggestB.most modernC.nearestD.cheapest
小题18:
A.TakeB.BringC.Send forD.Find
小题19:
A.howB.whatC.whereD.who
小题20:
A.coloredB.betterC.farthestD.same
问答题 简答题