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      1. WW > иԇ > иԇxČWg~Rȫ

        иԇxČWg~Rȫ

        lrg:2017-08-05݋

        иxԇ^УЌWsČWg~Rס˼·xٶСѼиԇxČWg~Rȫx鿴ϣゃЎ

        ʲônjWg~R

        иxnϣЌWsČWg~R^۲@~RxٶӰw_иxеĆ~Աwһ㹦~R͌Wg~Rһ㹦~]@ČWg磺animal, organ, time Wg~RָһضWƱ~RijһNarchaeopteryx(ʼB);ijһYnerve cord()ijһvʷr Cretaceous(׈׼o)ȵȡһ㹦~иxе@ЩWg~R׌҂xϵK

        wfxеČWg~R֮yҪ棺һ҂俼^кٕijضWƵ~R;ڶWg~Ryͨ~~Yȥœy;҂ܸBĝhZ˼֪磺иxгF^һNKittiwakeBhZֺt@~҂Ҳ] ^İČWg~RӰ҂xٶҲӰ҂B

        ʲôЌWg~R

        ôȻиһTZԿԇôʲôxЕF˶ČWg~R?@еČWg~Rʲôԇжoκν?

        ȑԓ緶ӢZĿԇ֮һԇWg~ROӋMиxһԭġ憖}Ĵ҂ԏиԇı|˼

        иĴ_ZԿԇиԇĸZӢZDžsӢZҌWČWô@ЩW(жxƻо)ZԿԇ͸ӂڜyԇܷڇĴWh沢ҌWڴWһWxʲô?@ȻǸNnôᘌ@Nиԇx־͑ԓWܷxnWnw׶ɌWgԵĶνMдČWg~R@иxҲF˶ČWg~Rֻ@ӲWǷܿn

        һmǧ퓵ӢnиxyȻöfxиx²һxӢn;ǣи¶xͿ϶ҲyӢn

        ""Ć}--ǰWg~R

        ǰWg~Rԓ_и漰wʮ֏VȻƌWĿƌWƌWˇgȵȟoFMпԇеČWg~RDzHҲǵЧʵиxµij}}ƫõġڿǰWg~Rr҂ֻھr}еČWg~RMһHH"JR~"Ŀ f@ӁeһČWg~RԱCԇrPWg~RXһҊıﻯWнFcarbohydrate(̼ˮ)нFvertebrate(׵)

        "|"Ć}--Wg~R

        ҂ڿϕrвͬWg~RČӴΣҲ"|"DzͬҪԚw

        һЛ]нoPጻx@Wg~Rֻ""Ϳ

        磺Among the species of seabirds that use the windswept cliffs of the Atlantic coast ofCanada in the summer to mate, lay eggs, and rear their young are common murres, Atlanticpuffins, black-legged kittiwakes, and northern gannets.

        "common murres", "Atlantic puffins", "black-legged kittiwakes", "northern gannets" ҂İČWg~R҂ֻҪxһЩBͿԣȻĸsքe"C" "A" "BK" "N"ӛ֮P}r磺

        According to the passage, which of the following birds conceal their nest?

        (A) Bonaparte's gulls

        (B) Atlantic puffins

        (C) Kittiwake gulls

        (D) Northern gannets

        BCDxֱӌ"A" "BK" "N"

        ڶнoPጻx@Wg~R҂HҪ֪""߀ҪжxҕҊWg~Rxጵ̖УxľͬλZľ䣬Z̖̖ȡ

        1. Further burial and slow cementation - a process by which crystals become boundtogether in a mosaic of intergrown ice crystals - finally produce solid glacial ice.

        @ƪ}DZcementation()һ|WgZ̖֮gIJnjcementationĽጶx

        2. The moon may be divided into two major terrains: the Maria (dark lowlands) and theTerrace (bright highlands).

        @һУMaria(º)Terrace()PČWg~R̖֮еIJ@M˽ԓµһ}Ŀ

        All of the following are true of the Maria EXCEPT:

        (A) They have small craters.

        (B) They have been analyzed by astronomers.

        (C) They have a rough texture.

        (D) They tend to be darker than the terrace.

        xDļnjԓԒ̖еČWg~ጲMеһ顣

        _đB挦Wg~R

        Wg~RȻһЩyƽrͿόһ_đBǺҪġȻиx鱾|ĽǶȳlģMǽWČW^ôڌW^Уxn^϶кܶgZİ]Ҋ^Wǰİ֪R׃Ϥ^ͨ^nxWЩWg~RŌW֪R

        ͬиxrҲһnW^һЩҪgZ(Wg~R)n(иx)Ǖoጶx@ЩҲnjWcҪcnͬǣnͶxͻصw̖ʾиxУ҂Ҫw̖ȫһӵȡcWg~RĽጶxһЩҪČWg~R"|"ҲҪô

        ֻҪסиxЌWg~RĿ챾|ƽrmeۣ_đټ_挦đBŴҶ܉򹥿иx廨TČWg~R

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