【阅读理解。Doyouknowthatyoucanuseyourwatchasacompass(指南针)onasunnyday?Takeawatchandpointthehourhandinthedirectionofthesun.Imaginealinewhichrunsfromthecenterofthewatchthroughapointhal】

阅读理解。

Doyouknowthatyoucanuseyourwatchasacompass(指南针)onasunnyday?Takeawatchandpoint

thehourhandinthedirectionofthesun.Imaginealinewhichrunsfromthecenterofthewatchthroughapoint

halfwaybetweenthehourhandandnumberone.Thislinewillsurelypointsouth.

Ifyouknowastronomyalittleyouwillunderstandwhythisworks.Inthenorthernhalfoftheearththesun

isinthesouthatnoon.InRussiatherealnoonisoneo'clock.Ifatthattimewepointthehourhandatthesun

thehourhandandthenumberonewillpointsouth.Thatiswhyyoumustimaginealinewhichwillrunfromthe

centerofthewatchthroughapointhalfwaybetweenthehourhandandnumberone.Itwillpointsouth.Ifyou

areinthesouthernpartofourplanetyoumustpointnumber12atthesun.Thelinewhichyoucanimagine

betweennumbertwelveandthehourhandwillthenshownorth.

1.Whenwecarryoutthisexperimentinthenorthernpartoftheearthweshouldpoint_____ atthesun.

A.number12

B.theminute-hand

C.thehourhand

D.numberone

2.Whatdoestheword"astronomy"meaninthispassage?

A.天文学

B.地理学

C.宇航学

D.逻辑学

3.Thepassagetellsusthatwecanuseawatch_____onasunnyday.

A.tostudytheweather

B.toshowdirection

C.toenjoyourselves

D.tokeepgoodtime

4.IfyouareinAustraliawhichtithefollowingistherightwaytoshownorth?

A B C D

5.What'sthebesttitleforthispassage?

A.YourWatchBecomesaCompass

B.TheStoryofaWatch

C.AnInterestingWatch

D.TheSunandaWatch