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据调查,某小学的学生中,基因型的比例为XBXB(42.32%)、XBXb(7.36%)、XbXb(0.32%)、XBY(46%)、XbY(4%),则在该地区XB和Xb的基因频率分别为( )
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中小学校长招聘考试《简单单选》真题及答案
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据调查某小学的小学生中基因型的比例为XBXB42.32%XBXb7.36%XbXb0.32%XBY4
某校的一个生物兴趣小组在研究性学习活动中开展了色盲普查活动据调查得知该校学生中基因型比率为XBXBX
5﹪
14﹪
13.2﹪
9.3﹪
据调查得知某小学的学生中基因型比率为XBXBXBXbXbXbXBYXbY=44%5%1%43%7%则
13.2%
5%
14%
9.3%
据调查得知某小学的学生中基因型比率为XBXBXBXbXbXbXBYXbY=44%5%1%43%7%则
13.2%
5%
14%
9.3%
据调查得知某小学的学生中基因型比率为XBXBXBXbXbXbXBYXbY=44%5%1%43%7%则
13.2%
5%
14%
9.3%
据调查某学校学生中的基因型比例为XBXB∶XBXb∶XbXb∶XBY∶XbY=43%∶6%∶1%∶4
14%
5%
15%
10%
调查某校学生中某基因型为XBXB42.32%XBXb7.36%XbXb0.32%XBY46%XbY4
6%、8%
92%、8%
78%、92%
8%、92%
据调查得知某小学的学生中基因型为XBXBXBXbXbXbXBYXbY=44%5%1%43%7%则Xb
13.2%
5%
14%
9.3%
据调查某小学的学生中基因型比率为XBXBXBXbXbXbXBYXbY=44%5%1%43%7%则Xb
13.2%
5%
14%
9.3%
女性红绿色盲基因携带者的基因型是
XBXb
XBXB
XbXb
XBY
据调查得知某小学的学生中基因型比率为BBBbbb=30%50%20%则b的基因频率为
70%
40%
55%
45%
据调查某地区人群中基因型的比例为XBXB∶XBXb∶XbXb∶XBY∶XbY=44%∶5%∶1%∶4
13.2%
5%
14%
9.3%
若是果蝇种群中XB的基因频率为90%Xb的基因频率为10%雌雄果蝇数相等理论上XbXbXbY的基因型
1%、2%
0.5%、5%
10%、10%
5%、0.5%
据调查得知某小学的学生中基因型比例为XBXB∶XBXb∶XbXb∶XBY∶XbY=44%∶5%∶1%
13.2%
5%
14%
9.3%
据调查某小学学生中的基因型及比例为XBXB42.32%XBXb7.36%XbXb0.32%XBY46
6%、8%
8%、92%
78%、92%
92%、8%
据调查某学校的学生中某一相对性状的各基因型比率为XBXBXBXbXBYXbY=44%6%42%8%则
13.2%
5%
4%
9.3%
某种雌雄异株的植物有宽叶和狭叶两种类型宽叶由显性基因B控制狭叶由隐性基因b控制B和b均位于X染色体上
雄性个体的基因型可能是XBY、XbY
雌性个体的基因型可能是XBXB、XBXb、XbXb
若后代全为宽叶雄株个体,则亲本基因型为XBXB和XbY
若后代性别比为1∶1,宽叶个体占3/4,则亲本基因型是XBXb和XBY
据调查得知某小学的学生中基因型及比例为XBXB∶XBXb∶XbXb∶XBY∶XbY=44%∶5%∶1
13.2%
5%
14%
9.3%
据调查某小学的小学生中基因型的比例为XBXB42.32%XBXb7.36%XbXb0.32%XBY4
6%、8%
8%、92%
78%、92%
92%、8%
一对夫妇如生女孩则女孩全为色盲基因携带者如生男孩则男孩全部正常这对夫妻的基因型为
XBXB、XbY
XBXb、XBY
XbXb、XBY
XBXb、XbY
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Itwasalmost9:00p.m.whenMaryleftherofficetogohomeitwas16.Shestartedhercaranddrovebacktoherhomeinthecountry.Thesnowwasheavy.ThenMarycrossedasmall17.Suddenlythecarrushedoutofthebridgewhichwascoveredwithice.Maryhitherheadonthesteeringwheel方向盘andlostconsciousness知觉.Whenshewokeupherheadwasbleeding流血andshewasshakingfromthe18.Shedidn’tknow19shewas.Maryopenedhercardoorandlookedaround.Shewas20thebridgeandhercarwassittingonthefrozenriver!Shefeltverysad.Sheknewtheicewouldn’tholdhercarforvery21.Shetriedtoclimbuptothebridgeseveraltimesbutshekept22inthesnow.Marytriedagainandagainbutstillshecouldn’tgetup.Sherealizedthat23couldseehercarunderthebridge.Shewaslyinginthesnowandshecouldn’tmove.Maryclosedhereyesandwaitedto24.Thenshehearda25.Maryopenedhereyes.Therewasanoldmanstandingoverher.Withthehelpoftheoldmanshestoodupandwalkedup.Ⅱ.完形填空/Cloze
读下列材料和图表回答问题 材料一燃烧煤石油天然气等化石能源产生的废气影响气候危及人体健康的问题日益严峻因而太阳能核能风能潮汐能等新能源的开发利用受到广泛重视据测算全球可开发风能总量比水能总量大十倍我国沿海地区也蕴藏着丰富的风能资源 材料二下图为亚马孙河河口位置 请回答下图框中的内容显示燃烧化石能源对人体危害的过程以反映开发新能源的必要性
读下列材料和图表回答问题 材料一燃烧煤石油天然气等化石能源产生的废气影响气候危及人体健康的问题日益严峻因而太阳能核能风能潮汐能等新能源的开发利用受到广泛重视据测算全球可开发风能总量比水能总量大十倍我国沿海地区也蕴藏着丰富的风能资源 材料二下图为亚马孙河河口位置 简述我国东南沿海地区风能资源丰富的自然条件
BOnedayJack’swifewascleaningoutacloset壁橱.LookatalltheseumbrellasshesaidtoJack.Thereareeightandtheyareallbroken.I’lltakethemtotheumbrellashopandhavethemmendedJacksaid.Jacktooktheeightumbrellastotheshopandleftthemthere.They’llbereadytomorrowtheshopkeepersaid.ThateveningJackwenthomefromtheofficebybusasusual.Hesatnexttoanoldwoman.Shehadanumbrellaonthefloornearher.Whenthebusreachedhisstophepickedupherumbrellaandstoodup.Hey!thewomansaid.That’smyumbrella!I’msorryJacksaidandatthesametimehegavetheumbrellatoher.Iwasn’tthinking.Pleaseexcuseme.Thenextdayhegotbacktheumbrellasfromtheumbrellashopandgotonthebus.AshesatdownavoicebehindhimsaidYoucertainlyhaveasuccessfulday!Heturnedaroundandsawthewomanwhoseumbrellahadalmostbeentakenbyhimthedaybefore.______hadthebrokenumbrellasmendedintheumbrellashop.
读以下两幅区域图回答问题 7月当你乘坐热气球在右图中的丙地上空遨游时请把可以俯瞰到的主要自然景观描述出来
Itwasalmost9:00p.m.whenMaryleftherofficetogohomeitwas16.Shestartedhercaranddrovebacktoherhomeinthecountry.Thesnowwasheavy.ThenMarycrossedasmall17.Suddenlythecarrushedoutofthebridgewhichwascoveredwithice.Maryhitherheadonthesteeringwheel方向盘andlostconsciousness知觉.Whenshewokeupherheadwasbleeding流血andshewasshakingfromthe18.Shedidn’tknow19shewas.Maryopenedhercardoorandlookedaround.Shewas20thebridgeandhercarwassittingonthefrozenriver!Shefeltverysad.Sheknewtheicewouldn’tholdhercarforvery21.Shetriedtoclimbuptothebridgeseveraltimesbutshekept22inthesnow.Marytriedagainandagainbutstillshecouldn’tgetup.Sherealizedthat23couldseehercarunderthebridge.Shewaslyinginthesnowandshecouldn’tmove.Maryclosedhereyesandwaitedto24.Thenshehearda25.Maryopenedhereyes.Therewasanoldmanstandingoverher.Withthehelpoftheoldmanshestoodupandwalkedup.Ⅱ.完形填空/Cloze
BOnedayJack’swifewascleaningoutacloset壁橱.LookatalltheseumbrellasshesaidtoJack.Thereareeightandtheyareallbroken.I’lltakethemtotheumbrellashopandhavethemmendedJacksaid.Jacktooktheeightumbrellastotheshopandleftthemthere.They’llbereadytomorrowtheshopkeepersaid.ThateveningJackwenthomefromtheofficebybusasusual.Hesatnexttoanoldwoman.Shehadanumbrellaonthefloornearher.Whenthebusreachedhisstophepickedupherumbrellaandstoodup.Hey!thewomansaid.That’smyumbrella!I’msorryJacksaidandatthesametimehegavetheumbrellatoher.Iwasn’tthinking.Pleaseexcuseme.Thenextdayhegotbacktheumbrellasfromtheumbrellashopandgotonthebus.AshesatdownavoicebehindhimsaidYoucertainlyhaveasuccessfulday!Heturnedaroundandsawthewomanwhoseumbrellahadalmostbeentakenbyhimthedaybefore.ThenextdayJacksawthewoman______
Itwasalmost9:00p.m.whenMaryleftherofficetogohomeitwas16.Shestartedhercaranddrovebacktoherhomeinthecountry.Thesnowwasheavy.ThenMarycrossedasmall17.Suddenlythecarrushedoutofthebridgewhichwascoveredwithice.Maryhitherheadonthesteeringwheel方向盘andlostconsciousness知觉.Whenshewokeupherheadwasbleeding流血andshewasshakingfromthe18.Shedidn’tknow19shewas.Maryopenedhercardoorandlookedaround.Shewas20thebridgeandhercarwassittingonthefrozenriver!Shefeltverysad.Sheknewtheicewouldn’tholdhercarforvery21.Shetriedtoclimbuptothebridgeseveraltimesbutshekept22inthesnow.Marytriedagainandagainbutstillshecouldn’tgetup.Sherealizedthat23couldseehercarunderthebridge.Shewaslyinginthesnowandshecouldn’tmove.Maryclosedhereyesandwaitedto24.Thenshehearda25.Maryopenedhereyes.Therewasanoldmanstandingoverher.Withthehelpoftheoldmanshestoodupandwalkedup.Ⅱ.完形填空/Cloze
世界上最早的教育文献是我国的
Couldyou______mehowto______thiswordinEnglish
HespeaksEnglish______thananyotherstudentinhisclass.
—MustIfinishwateringtheflowersnow—Noyou______.
COnahotAfricanmorningLeilawaslyingonherstomachandanelephantwaswalkingtowardsher.Leilawaited.Thenshepushedthebuttononhercamera.AndIgotmybestphotoofanelephanteverbylyingundermycarLeilaexplained.Iwantedtogetclosetotheelephantsbutofcoursethiswasdangerous;theyhadtheirbabieswiththem.SoeverymorningIusedtoparkmycarintheopennearthepath.Theyusedtotakethesamepatheverymorningwhentheyleftthewaterhole.Afteraweektheywereusedtoseeingmycar.SothenextmorningIlayunderitandgotmyphoto!ManyofthebestwildlifephotoscomefromgoodplanningInAfricaphotographerssetuptheirhides藏匿处nearwaterholes.Theyalsosetuphidesnearforestpathsasanimalsusethesamepathseverynight.Forbird-watchingmanylakeshavehides.Insidethehidesbird-watcherscanwatchalldayintheshade荫处outofthewindandrain.Goodwildlifephotosareneededforhookspostcardsmagazinesandnewspapers.Butasuccessrateof1in20isgood.WhydidLeilalieunderhercaronthestomach
AAlittleboyinvitedhismothertoattend出席hiselementaryschool’sfirstteacher-parentmeeting.Tothelittleboy’sdismayhismothersaidshewouldgo.Thiswouldbethefirsttimethathisclassmatesandteachersmethismotherandhewasembarrassed尴尬的byherappearance.Therewasasevere严重的scar伤疤thatcoverednearlythewholerightsideofherface.Theboyneverwantedtotalkaboutwhyorhowshegotthescar.Atthemeetingthepeoplewereimpressed留下深刻的印象bythekindnessofhismotherwiththescarbutthelittleboywasstillembarrassedandhidhimselffromeveryone.Howeverhecouldhearclearlytheconversationbetweenhismotherandtheteacher.Howdidyougetthescaronyourfacetheteacherasked.ThemotherrepliedWhenmysonwasababyhewasinaroomthatcaughtonfire.EveryonewastooafraidtogoinbecausethefirewasoutofcontrolbutIwentin.AsIwasrunningtowardshisbedIsawaburningwoodfallingdownandIplacedmyselfoverhimtryingtoprotecthim.Iwasknockedtobeunconscious无知觉的butluckilyafiremancameinandsavedbothofus.Shetouchedtheburnedsideofherface.ThisscarwillbeforeverbutuntiltodayIhaveneverregretteddoingwhatIdid.Whenthelittleboyheardthishecouldn’thelprunningtowardshismotherwithtearsinhiseyes.Hehuggedherandfelthismotherwasgreaterthananyone.Heheldherhandtightlyfortherestoftheday.What’sthemeaningoftheunderlinedwordinthefirstparagraph
I'dlike______Jerrysoon.
AAlittleboyinvitedhismothertoattend出席hiselementaryschool’sfirstteacher-parentmeeting.Tothelittleboy’sdismayhismothersaidshewouldgo.Thiswouldbethefirsttimethathisclassmatesandteachersmethismotherandhewasembarrassed尴尬的byherappearance.Therewasasevere严重的scar伤疤thatcoverednearlythewholerightsideofherface.Theboyneverwantedtotalkaboutwhyorhowshegotthescar.Atthemeetingthepeoplewereimpressed留下深刻的印象bythekindnessofhismotherwiththescarbutthelittleboywasstillembarrassedandhidhimselffromeveryone.Howeverhecouldhearclearlytheconversationbetweenhismotherandtheteacher.Howdidyougetthescaronyourfacetheteacherasked.ThemotherrepliedWhenmysonwasababyhewasinaroomthatcaughtonfire.EveryonewastooafraidtogoinbecausethefirewasoutofcontrolbutIwentin.AsIwasrunningtowardshisbedIsawaburningwoodfallingdownandIplacedmyselfoverhimtryingtoprotecthim.Iwasknockedtobeunconscious无知觉的butluckilyafiremancameinandsavedbothofus.Shetouchedtheburnedsideofherface.ThisscarwillbeforeverbutuntiltodayIhaveneverregretteddoingwhatIdid.Whenthelittleboyheardthishecouldn’thelprunningtowardshismotherwithtearsinhiseyes.Hehuggedherandfelthismotherwasgreaterthananyone.Heheldherhandtightlyfortherestoftheday.Accordingtothepassagethelittleboy_______
Ilikedsports______Iwasyoung.
2005年10月由国内一家地理杂志社发起的中国最美的地方评选活动揭晓入选新十大名山的有西藏南迦巴瓦峰四川贡嘎山西藏珠穆朗玛峰云南梅里雪山安徽黄山四川仙乃日稻城三神山新疆乔戈里峰西藏冈仁波齐峰山东泰山四川峨眉山而华山庐山等自古闻名的名山却遗憾落榜据此回答下列问题导致某些名山落选的原因可能有
变式
—Thepetdoginyourhandisverynice.Isit______—YesbutI'llgiveittomyfriendLucyas______birthdaypresent.
广义的教育制度是指
下图为北半球某区域图读图完成下列问题 根据环境条件说明甲盆地内城市间交通联系适宜发展航空运输的理由
AAlittleboyinvitedhismothertoattend出席hiselementaryschool’sfirstteacher-parentmeeting.Tothelittleboy’sdismayhismothersaidshewouldgo.Thiswouldbethefirsttimethathisclassmatesandteachersmethismotherandhewasembarrassed尴尬的byherappearance.Therewasasevere严重的scar伤疤thatcoverednearlythewholerightsideofherface.Theboyneverwantedtotalkaboutwhyorhowshegotthescar.Atthemeetingthepeoplewereimpressed留下深刻的印象bythekindnessofhismotherwiththescarbutthelittleboywasstillembarrassedandhidhimselffromeveryone.Howeverhecouldhearclearlytheconversationbetweenhismotherandtheteacher.Howdidyougetthescaronyourfacetheteacherasked.ThemotherrepliedWhenmysonwasababyhewasinaroomthatcaughtonfire.EveryonewastooafraidtogoinbecausethefirewasoutofcontrolbutIwentin.AsIwasrunningtowardshisbedIsawaburningwoodfallingdownandIplacedmyselfoverhimtryingtoprotecthim.Iwasknockedtobeunconscious无知觉的butluckilyafiremancameinandsavedbothofus.Shetouchedtheburnedsideofherface.ThisscarwillbeforeverbutuntiltodayIhaveneverregretteddoingwhatIdid.Whenthelittleboyheardthishecouldn’thelprunningtowardshismotherwithtearsinhiseyes.Hehuggedherandfelthismotherwasgreaterthananyone.Heheldherhandtightlyfortherestoftheday.Afterreadingthepassageweknow_______
Itwasalmost9:00p.m.whenMaryleftherofficetogohomeitwas16.Shestartedhercaranddrovebacktoherhomeinthecountry.Thesnowwasheavy.ThenMarycrossedasmall17.Suddenlythecarrushedoutofthebridgewhichwascoveredwithice.Maryhitherheadonthesteeringwheel方向盘andlostconsciousness知觉.Whenshewokeupherheadwasbleeding流血andshewasshakingfromthe18.Shedidn’tknow19shewas.Maryopenedhercardoorandlookedaround.Shewas20thebridgeandhercarwassittingonthefrozenriver!Shefeltverysad.Sheknewtheicewouldn’tholdhercarforvery21.Shetriedtoclimbuptothebridgeseveraltimesbutshekept22inthesnow.Marytriedagainandagainbutstillshecouldn’tgetup.Sherealizedthat23couldseehercarunderthebridge.Shewaslyinginthesnowandshecouldn’tmove.Maryclosedhereyesandwaitedto24.Thenshehearda25.Maryopenedhereyes.Therewasanoldmanstandingoverher.Withthehelpoftheoldmanshestoodupandwalkedup.Ⅱ.完形填空/Cloze
—Wouldyouliketogototheconcertwithustonight—I'dloveto______Ican't.Ihavealotofhomeworktodo.
教育要适应人的发展的顺序性规律应做到
下图为北半球某区域图读图完成下列问题 用所学地理知识分析丙地所在的大地形区对我国夏季降水的影响
Itwasalmost9:00p.m.whenMaryleftherofficetogohomeitwas16.Shestartedhercaranddrovebacktoherhomeinthecountry.Thesnowwasheavy.ThenMarycrossedasmall17.Suddenlythecarrushedoutofthebridgewhichwascoveredwithice.Maryhitherheadonthesteeringwheel方向盘andlostconsciousness知觉.Whenshewokeupherheadwasbleeding流血andshewasshakingfromthe18.Shedidn’tknow19shewas.Maryopenedhercardoorandlookedaround.Shewas20thebridgeandhercarwassittingonthefrozenriver!Shefeltverysad.Sheknewtheicewouldn’tholdhercarforvery21.Shetriedtoclimbuptothebridgeseveraltimesbutshekept22inthesnow.Marytriedagainandagainbutstillshecouldn’tgetup.Sherealizedthat23couldseehercarunderthebridge.Shewaslyinginthesnowandshecouldn’tmove.Maryclosedhereyesandwaitedto24.Thenshehearda25.Maryopenedhereyes.Therewasanoldmanstandingoverher.Withthehelpoftheoldmanshestoodupandwalkedup.Ⅱ.完形填空/Cloze
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