问题 选择题

该图是北半球局部日照图,AB为晨昏线,纬线BC弧度为90º。图示区域恰好全部为8日。读图回答问题。

小题1:此时,国际标准时间是

A.8日18时

B.7日6时

C.7日18时

D.8日6时小题2:此日,余姚居民观测到日出、日落时日影倒向观测者的

A.正西方,正东方

B.西北方,东北方

C.东南方,西南方

D.西南方,东南方

答案

小题1:C

小题2:D

题目分析:

小题1:因为图示区域为8日,恢复到完整的图后,两边的线就是日期变更线,AC可能是180°也可能是零时,但根据晨昏线A处必定是6时或18时,所以A处为180°,则B处为零时。且图示为北半球,故自转方向为逆时针,故判断B点的经线为90°E,故计算国际标准时间,较B点时间晚6个小时,为7日18时。

小题2:结合上题分析,图示B点为0时,即为夜半球的平分线,故图示北极地区出现极昼,故太阳直射点位于北半球,故余姚出现昼长夜短,故日出应位于东北方向,正午太阳位于正南,日落为西北方向,故日影朝向与太阳方位相反,故选D项。

点评:是时间问题计算的典型性试题,值得借鉴。解题的关键是掌握晨昏线图上的6点、18点的位置和日期分界图上的0时和180°的位置,并注意两者的结合。

选择题
完形填空
阅读下面短文,掌握其大意,然后从21~40各题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。
When I was a law professor, a student reported that I made an error in grading his exam by giving him too many points. He was         and after thanking him for his honesty, I changed the          in my records. His beaming (欢笑的) face turned to         “You’re lowering my grade?” he said angrily. “I would never have come in          ……”
He didn’t finish the          but it was obvious that his display of honesty was false. He thought he’d have it all—praise and the          grade.
Several colleagues thought I should have let the higher grade stand        all I’d accomplished was to discourage him from being         in the future. And every time I tell this         , some people agree with this remark.
But I can’t see how I could give good          for worsening my mistake in grading by undermining (损害) the honesty of all my grades by failing to          an error. The grade itself would be a dishonest reflection of his          and it would have been         to other students. How could I possibly give a          a gift of an unearned grade?
I know voluntarily reporting an error in one’s favor is         , but, like          extra change, it’s the         thing to do. People with real honesty, hate to give up benefits as mush as anyone else. The difference is that for them a good conscience and reputation is reward enough to give reason for the cost of doing the right thing.
Perhaps         the student’s grade did discourage him from being honest in the future, but bribing (贿赂) him to be honest so that he does the right thing when it’s cost-free would have         him even more. The duty to be honest is         right and wrong, not risks and rewards.
小题1:
A.wiseB.rightC.rigidD.angry
小题2:
A.fileB.noteC.nameD.grade
小题3:
A.griefB.shockC.happinessD.careless
小题4:
A.whetherB.whichC.ifD.what
小题5:
A.sentenceB.wordC.examD.lesson
小题6:
A.higherB.lowerC.moreD.less
小题7:
A.suchB.because C.soD.whether
小题8:
A.braveB.adventurousC.honestD.successful
小题9:
A.manB.storyC.wayD.exam
小题10:
A.reasonB.causeC.excuseD.result
小题11:
A.makeB.findC.avoidD.correct
小题12:
A.reactionB.senseC.signD.knowledge
小题13:
A.unfairB.cruelC.toughD.funny
小题14:
A.peopleB.teacherC.studentD.worker
小题15:
A.activeB.oftenC.unusualD.curious
小题16:
A.receivingB.returningC.earningD.paying
小题17:
A.manyB.wellC.badD.right
小题18:
A.lowering B.influencing C.protect ingD.separating
小题19:
A.ruinedB.encouragedC.improvedD.blamed
小题20:
A.inB.afterC.about D.during