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阅读下列短文,从每题所给的四个选项中,选出最佳选项。Whentheylookattheskypeopleusuallyfindtheskylooksblue-notorangeredgreenoryellow.Doyouknowwhy?
1人问答
问题描述:

(1)

(2)

(3)

阅读下列短文,从每题所给的四个选项中,选出最佳选项。

  Whentheylookattheskypeopleusuallyfindtheskylooksblue-notorangeredgreenoryellow.Doyouknowwhy?

  Itgetsitsbluecolourfromthesunlightthatshinesthroughtheair.Sunlightcontainsallthecolourswhichtherainbowismadeupofbutthesecouloursarescatteredastheypassthroughtheair.Somecouloursarescatteredmorethanothersandthecolourthatisscatteredthemostisthecolouryousee–blue.

  Theskyusuallylookslightblue.Butitwouldbedeepdarkblueifyoustoodontopofthehighestmountainwherethereislessairbetweenyouandthesuntoscatterthesunlighttheskywouldbesodarkthatitwouldbeblack.

  Sometimestheskydoesn'tlookblue.Atsunriseandsunsetthelightfromthesunsometimesscatteredinsuchawaythatyouseeredorangeandothercoloursinthesky.

Whytheskylooksblue?

[  ]

A.

Thesunlightisblueitself.

B.

Thesunlightismadeupofallthecoloursassameasrainbow

C.

Thebluecolourisscatteredmostamongallcolours

D.

Thesunlightcontainsonlyblue.

Accordingtothepassagetheastronaut(宇航员)seetheskywouldbe________.

[  ]

A.

lightblue

B.

deepgreen

C.

darkblue

D.

redororange

Whencanyouseetheskybecomeredororange?

[]

A.

Inthemorning

B.

马天程回答:
  答案:1.C;2.C;3.A;4.A;5.B;
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