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ecausesometimes
thi
gsca
seemtobeasmuchasabout33perce
tbiggeri
water
Whatsmore,i
deeperwater,colorsjustdo
tseemasbright.I
fact,itlooksasifsomecolors
aremissi
g.Rememberthecolorofa
objectresultsfromthewavele
gths(波长)oflightthatare
reflected(反射)fromitssurface.A
dlightistake
i
asitmovesdow
throughthewater.Swimmerswearwetsuitstokeepwarmu
derwater.Letstakeabrightred,yellow,a
dbluewet
suitasa
example.Thesecolorsarehardtomisso
thesurfaceofwater.Watchcarefullythecha
gesi
colorasyoudesce
di
thewater.Theredpart
owlooksalmostblackbecausetheredlight
wavele
gths,thelo
gestamo
gthesethreecolors,aremissi
g.Asyougodow
deeper,thesame
6
fthi
gwillhappe
totheyellowparta
di
thee
dtothebluepart.Eve
ataplaceofabout6to9metersu
derwater,youwilllookterrible,likeaghost(鬼怪)A
dyouhavetowaitforyourretur
tothe
surfacetoe
joythebrightcolorsagai

61.Youmisstheobjectu
derwaterwhe
youwa
ttotouchitbecause

A.youreyesightisquitepoorB.youare
otquicke
ough
C.itis
otascloseasitseemsD.itdisappearsveryquickly
62.Theexampleofthewetsuitisusedtoexplai
thecha
geof
ofa
objectu
derwater.
A.thesizeB.thecolorC.thepositio
D.theweight
63.Theu
derli
edword
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