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一位科学家在显微镜下观察到，载玻片上每单位面积平均有50个炭疽杆菌，把此载玻片放在液体培养液中培养4h后，将菌液稀释10倍，再放到相同条件的显微镜下观察，发现每单位面积平均有80个炭疽杆菌。则炭疽杆菌...
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某同学在显微镜下观察发现载玻片上每单位面积平均有50个酵母菌细胞把制作此装片的样液继续培养6h后再稀
0.5 h
1 h
1.5 h
2 h
如果在载玻片上写一个如图甲所示的生字怎样使显微镜下观察到的图象变成如图乙所示
将载玻片顺时针转动90°
将载玻片逆时针转动90°
将载玻片向左上角移动
将载玻片向右下角移动
光学显微镜是中学生物实验室里常用的重要仪器之一下列是使用光学显微镜过程中的有关问题请回答1用显微镜观
4分光学显微镜是中学生物实验室里常用的重要仪器之一下列是使用光学显微镜过程中的有关问题请回答1用显微
光学显微镜是中学生物实验室里常用的重要仪器之一下列是使用光学显微镜过程中的有关问题请回答1用显微镜观
一个科学家在显微镜下观察到载玻片上每单位面积内平均有50个酵母菌把此载玻片放在液体培养基中4h后将其
1 h
2 h
4 h
不能确定
小刚用100倍和200倍的显微镜观察同一玻片标本的同一部位时在100倍显微镜下观察到的视野比200倍
细胞多、细胞大
细胞少、细胞大
细胞多、细胞小
细胞少、细胞小
下列关于显微镜使用的叙述不正确的是
在显微镜视野内观察到的物象是“b”，在载玻片上的实物为“d”
下降显微镜镜筒时，眼睛应从侧面注视物镜
在安放显微镜时，应把显微镜放在离实验台略偏左的地方
显微镜的放大倍数是指被观察物体的长度或宽度的放大倍数
在显微镜下观察到玻片标本上的一个物像偏在视野左上方若要将此物像移至视野的中央应将载玻片移向
左上方
左下方
右上方
右下方
一位科学家在显微镜下观察到载玻片上每单位面积平均有50个炭疽杆菌把此载玻片放在液体培养液中培养4小时
1小时
2小时
4小时
无法确定
一位同学在用显微镜进行观察时在视野内看到一小黑点分别移动载玻片和目镜小黑点都不动则黑点可能在
反光镜上
物镜上
盖玻片上
目镜上
某同学在显微镜下观察发现载玻片上每单位面积平均有50个酵母菌细胞把制作此装片的样液继续培养6h后再稀
0.5 h
1 h
1.5 h
2 h
某同学在显微镜下观察发现载玻片上每单位面积平均有50个酵母菌细胞把此载玻片放入液体中培养4小时后再稀
不能确定
1小时
2小时
4小时
有关显微镜的知识正确的是
一个细小物体若被显微镜放大50倍，这里“被放大50倍”是指放大该标本的面积。
视野下观察到眼虫游向右上方，则应将载玻片向右上方移动，以便加以追踪。
显微镜的物镜越长放大倍数越小，而目镜越长放大倍数越大。
在低倍镜下观察到物像时，可以直接使用高倍物镜观察。
每单位面积上平均有50个酵母细胞放在显微镜下观察在液体培养基中培养4h后稀释10倍与以前相同的条件下
1/4 h
1/2 h
1 h
2 h
如果在载玻片上写一个如图甲所示的生字怎样使显微镜下观察到的图象变成如图乙所示
将载玻片顺时针转动90°
将载玻片逆时针转动90°
将载玻片向左上角移动
将载玻片向右下角移动
在载玻片上写一个字母b用显微镜观察到的图像是
b
q
d
p
某校一位生物老师在载玻片上写下一个9字让一名学生用显微镜观察该学生放大的图像形状是
6
3
9
8
下列有关显微镜使用的叙述不正确的是
在显微镜视野内观察到的物像是“bpdq”，则载玻片上的实物为 “bpdq”
下降显微镜镜筒时，眼睛应从侧面注视物镜
在安放显微镜时，应把显微镜放在离实验桌左边缘7厘米左右的地方
显微镜的放大倍数是指对被观察物体长或宽的放大倍数
现有一台显微镜它有两个目镜放大倍数分别是515两个物镜放大倍数分别是1040那么这台显微镜的最大放大
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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
EBEIJING—NOCarDaywasfirststartedby34citiesinFranceonSeptember221998.Itwasstartedtoprotecttheenvironment.Bynowmorethan1000citiesaroundtheworldhavehadaNoCarDay.ThefirstNoCarDayinChinawasinChengduin2001.OthercitiesincludingTaipeiShanghaiandWuhanalsosupport支持theday.InBeijingmoreandmorepeoplearejoiningintheactivity.Itasksdriverstoleavetheircarsathomeforonedayeachmonthandwalkorrideabiketowork.ItalsocallsonBeijingersnottousecarsonJune5WordEnvironmentDay.Theslogan口号forthedayisIfwedriveforonelessdaywecanhaveonemoreniceday.Sofarmorethan200000drivershaveshowntheirsupport.Wecan’tcontroltheweatherbutwecanchoosenottodrivesaidWuZonghuaacarclubchairman.Beijingistryingtohave238blueskydaysthisyear.InthefirstquarterofthisyearBeijingonlyhad52blueskydays.Thiswas11dayslessthanthenumberforthesameperiodlastyear.Muchofthedust灰尘comesfromthedesert沙漠.Butcarscausemostoftheairpollution污染.WemustdomoreforNoCarDay.Accordingtothepassagetherewere______blueskydaysinthefirstquarteroflastyearinBeijing.
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
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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
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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.What’sthemeaningoftheunderlinedwordinthefirstparagraph
EBEIJING—NOCarDaywasfirststartedby34citiesinFranceonSeptember221998.Itwasstartedtoprotecttheenvironment.Bynowmorethan1000citiesaroundtheworldhavehadaNoCarDay.ThefirstNoCarDayinChinawasinChengduin2001.OthercitiesincludingTaipeiShanghaiandWuhanalsosupport支持theday.InBeijingmoreandmorepeoplearejoiningintheactivity.Itasksdriverstoleavetheircarsathomeforonedayeachmonthandwalkorrideabiketowork.ItalsocallsonBeijingersnottousecarsonJune5WordEnvironmentDay.Theslogan口号forthedayisIfwedriveforonelessdaywecanhaveonemoreniceday.Sofarmorethan200000drivershaveshowntheirsupport.Wecan’tcontroltheweatherbutwecanchoosenottodrivesaidWuZonghuaacarclubchairman.Beijingistryingtohave238blueskydaysthisyear.InthefirstquarterofthisyearBeijingonlyhad52blueskydays.Thiswas11dayslessthanthenumberforthesameperiodlastyear.Muchofthedust灰尘comesfromthedesert沙漠.Butcarscausemostoftheairpollution污染.WemustdomoreforNoCarDay.Thereare______citiesinChinathatsupportNoCarDayaccordingtothepassage.
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_______
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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_______
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—Wouldyouliketogototheconcertwithustonight—I'dloveto______Ican't．Ihavealotofhomeworktodo．
教育要适应人的发展的顺序性规律应做到
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
读以下两幅区域图回答问题 左图为某月等温线分布图简述130经线以东地区气温分布的显著特点并运用大气运动的相关知识解释甲地等温线沿虚线方向弯曲的原因
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