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Although blue flowers are unusual,almost no(B)2.What is the main focus of Invitation to aplant has blue leaves.2 Pigments appear the colorof the light they don't absorb(吸收)，but insteadBanquet?Ereflect.The most common plant pigment is chlorophyllA.Describing dishes served at formal(叶绿素)，so plants appear green because chlorophyllbanquets.doesn't absorb but rather reflects green light.B.Exploring various sides of Chinesecooking.A.Blue is important to us for several reasons.C.Providing instructions on cookingB.Animals have a much harder time turning blue.C.But when it comes to nature,blue is very uncommon.Chinese dishes.D.Many have been trying to grow the perfect blue flower.D.Showing the popularity of ChineseE.The main reason for this has to do with the physics of light.F.If they were shaped differently,the blue color would disappear.gcooking in the West.G.Blue birds get their color through a similar but slightly differenprocess from this butterfly.(D)3.Why do Westerners refuse marginal animal3 Many pigments in animals come from theparts?food they eat.For example,the golden color ofA.They think these parts are unsafe to eat.goldfish comes from their food.Since there is noBB.They consider these parts too expensive.true blue color in plants,animals can't turn blueC.They find the taste of these partsthrough food.unpleasing.D.They think poverty drives people to eatBlue is important to us for several reasons.B.Animals have a much harder time turning blue.these parts.C.But when it comes to nature,blue is very uncommonD.Many have been trying to grow the perfect blue flower.E.The main reason for this has to do with the physics of light.F.If they were shaped differently,the blue color would disappear.G.Blue birds get their color through a similar but slightly differentprocess from this butterfly.Instead of pigment mixing or changing,blue is(C)4.What is Ms Dunlop's attitude towardsachieved in many animals by making structures thatwesternized "Chinese food"?change the wavelength of light.For example,the blueA.Uninterested.Gmorpho butterfly gets its color from the fact that itsB.Concerned.wings cause light to bend in such a way that the onlyC.Supportive.wavelength of light it reflects is blue.4D.Doubtful.A.Blue is important to us for several reasons.B.Animals have a much harder time turning blueC.But when it comes to nature,blue is very uncommon.D.Many have been trying to grow the perfect blue flower.E.The main reason for this has to do with the physics of light.F.If they were shaped differently,the blue color would disappear.gG.Blue birds get their color through a similar but slightly differentprocess from this butterfly.阅读下面短文，从短文后的选项中选出可以填入~Today blue flowers are still highly prized.5空白处的最佳选项。选项中有两项为多余选项。However.while blue roses are still hard to find,a读A.Blue is important to us for several reasons.team has been able to produce the first truly blueB.Animals have a much harder time turning blue.Dchrysanthemum(菊花).C.But when it comes to nature,blue is very uncommon.空D.Many have been trying to grow the perfect blue flowerE.The main reason for this has to do with the physics ofA.Blue is important to us for several reasonslight.B.Animals have a much harder time turning blue.F.If they were shaped differently,the blue color wouldC.But when it comes to nature,blue is very uncommondisappear.D.Many have been trying to grow the perfeet blue flower.G.Blue birds get their color through a similar but slightlyE.The main reason for this has to do with the physics of light.different process from this butterfly.F.If they were shaped differently,the blue color would disappear.G.Blue birds get their color through a similar but slightly differentprocess from this butterfly.Blue is a very important color on earth.1阅读下面短文，从每题所给的A、B、C、D四个选Less than 1 in 10 plants have blue flowers and farfewer animals are blue.Why is that?Part of the完项中选出可以填入空白处的最佳选项。Ungrateful(忘恩负义的)children becomereason is that there isn't really a true blue color orselfish adults.Luckily for us,there're parents outpigment (in nature and both plants and animalshave to perform tricks of the light to appear blue.there who fix these 1 patterns with importantA.Blue is important to us for several reasons.空life lessons.Haley Hassell is one of those parents.When her six-year-old daughter threw a new pencilB.Animals have a much harder time turning blueC.But when it comes to nature,blue is very uncommon.box in the trash(垃圾)，she used the2asaD.Many have been trying to grow the perfect blue flower.learning opportunity.E.The main reason for this has to do with the physics of light.F.If they were shaped differently,the blue color would disappear.(O1.A.growth B.thoughtC.behaviorD.speechG.Blue birds get their color through a similar but slightly different(B)2.A.existenceB.caseC.toolD.savingprocess from this butterfly.3