河北省沧州盐山中学2018_2019学年高二英语下学期周测试题（3.18_3.24，无答案）

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1、河北省沧州盐山中学2018-2019学年高二英语下学期周测试题（3.18-3.24，无答案）一、阅读理解（本大题共5小题，共10.0分）AFORushumans，oneofthegreatestexperiencesistotasteallkindsofdeliciousfood．Butforpenguins，theycannotgetatasteofthishappiness．That'sbecausepenguinscan'tactuallytastethedeliciousflavors（味道）oftheirfavoritefood-fish!ScientistsfromtheUn

2、iversityofMichiganexaminedthegenome（基因组）offivespeciesofpenguins．Theyfoundthatnotonecantasteumami（鲜味），theflavorofmeatorfish，theBBCreported．Manyanimalshavefivebasictastes：sweet，sour（酸），saltybitter（苦）andumami．Butaccordingtogenetic（遗传的）data，penguinsarebelievedtohaveonlysourandsaltytastes．Thesefinding

3、saresurprisingandpuzzling．Andscientistsdon'thaveagoodexplanationforthem．Buttheyhaveafewideas．First，oneoftheumamigenesdoesn'tworkincoldtemperatures．"It'saboutzerodegreeswhentheyeatcoldfish，"ZhangJianzhi，theleadscientist，toldtheDailyMail，soevenifthepenguinshadafunctional（功能的）gene，itmightnotworkwhen

4、theyneededit．Plus，penguins'tonguesareveryspecialwhichmayhavesomethingtodowiththeirlackoftaste．Insteadofbeingcoveredwithtastebudswhichhelptotastefood，penguins'tonguesareextremelyspiky（钉子似的）．Thisisbetterforthemtoholdslippery（滑的）fishthantastingthem．Onestudyevenshowedthatsometypesofpenguinsdon'tevenh

5、avetastebuds．，Butpenguinsseemtobemanagingjustfine．"Theirbehaviorofswallowingfoodwholeandtheirtonguestructureandfunctionsuggestthatpenguinsneednotasteperception（知觉），"saidZhang．1.Thestudyfindsthat______．A.differentpenguinshavetheirownfavoritefishB.penguinshavedifferentgenomesforthefivetastesC.pengu

6、inscan'ttastetheflavoroffishD.penguinsdon'thaveanyofthefivebasictastes2.Penguinscanonlytaste______．A.saltyandsourB.sourandsweetC.sweetandsaltyD.bitterandumami3.FromParagraph5，welearnthat______．A.penguins'umamigenesworkwellincoldtemperaturesB.penguinsonlyeatcoldfishC.temperaturescandecidetheumamig

7、enesofpenguinsD.theumamigenesinpenguinswouldworkwhenneeded4.Paragraph6tellsusthat______．A.alackoftasteisgoodforpenguinsB.penguins'tonguesareveryspikyC.penguinsprefertoeatslipperyfishD.therearenotastebudsonpenguins'tong