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假设你是晨光中学的学生会__李津。一批来自英国的高中生与你校学生开展了为期两周的交流活动。现在，他们即将回国，你将在欢送会上致辞。请根据以下提示写一篇发言稿。 （1）回顾双方的交流活动（如学习、生活...
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阅读下面短文掌握其大意然后从21—40各题所给的四个选项ABC和D中选出最佳选项并在答题纸上将该选项标号涂黑 DuringthewarmyhusbandwasstationedatanarmycampinadesertinCalifornia.Iwenttolivethereinordertobe21 him.Ihatedtheplace.Ihadnever 22 beensounhappy.Myhusbandwasorderedoutonalong-termdutyandIwasleftinatinyshack棚屋alone.Theheatwas 23 -almost1250Fevenintheshadeofacactus仙人掌24 asoultotalkto.Thewindblewnon-stopandallthefoodIateandtheevryairIbreathedwere 25 withsandsandsand! IwassosorryformyselfthatIwrotetomyparents.ItoldthemIwas 26 andcomingbackhome.IsaidIcouldn’tstanditoneminutelonger.I 27 beinprison!Myfatheransweredmy 28 withjusttwolines-twolinesthatwillalwayssinginmy 29 -twolinesthatcompletelychangedmylife: Twomenlookedoutfromprisonbars Onesawthemudtheothersawthestars Ireadthosetwolines 30 Iwasashamedofmyself.ImadeupmymindIwouldfindoutwhatwasgoodinmypresent 31 ;Iwouldlookforthestars Imadefriendswiththenativesandtheir 32 amazedme.Theygavemepresentsoftheirfavoriteartworkswhichtheyhad 33 toselltotoueists.Istudiedthedelightfulformsofthecactus.Iwatchedforthedesertsunsetsand 34 forseashellsthathadbeenlefttheremillionsofyearsagowhenthedeserthadbeenanocean 35 Whatbroughtaboutthis 36 changeinme?Thedeserthadn’tchanged37 Ihad.Ihadchangedmy 38 AndbydoingsoIchangedanunhappyexperienceintothemostamazing 39 ofmylife.IwasexcitedbythisnewworldthatIhaddicoveredIhadlookedoutofmyself-creatdedprisonand 40 thestars 34
人类免疫缺陷病毒HIV有高度变异性感染机体后可损伤多种免疫细胞并通过多种机制逃避免疫系统识别和攻击下列相关叙述错误的是
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阅读下面短文掌握其大意然后从21—40各题所给的四个选项ABC和D中选出最佳选项并在答题纸上将该选项标号涂黑 DuringthewarmyhusbandwasstationedatanarmycampinadesertinCalifornia.Iwenttolivethereinordertobe21 him.Ihatedtheplace.Ihadnever 22 beensounhappy.Myhusbandwasorderedoutonalong-termdutyandIwasleftinatinyshack棚屋alone.Theheatwas 23 -almost1250Fevenintheshadeofacactus仙人掌24 asoultotalkto.Thewindblewnon-stopandallthefoodIateandtheevryairIbreathedwere 25 withsandsandsand! IwassosorryformyselfthatIwrotetomyparents.ItoldthemIwas 26 andcomingbackhome.IsaidIcouldn’tstanditoneminutelonger.I 27 beinprison!Myfatheransweredmy 28 withjusttwolines-twolinesthatwillalwayssinginmy 29 -twolinesthatcompletelychangedmylife: Twomenlookedoutfromprisonbars Onesawthemudtheothersawthestars Ireadthosetwolines 30 Iwasashamedofmyself.ImadeupmymindIwouldfindoutwhatwasgoodinmypresent 31 ;Iwouldlookforthestars Imadefriendswiththenativesandtheir 32 amazedme.Theygavemepresentsoftheirfavoriteartworkswhichtheyhad 33 toselltotoueists.Istudiedthedelightfulformsofthecactus.Iwatchedforthedesertsunsetsand 34 forseashellsthathadbeenlefttheremillionsofyearsagowhenthedeserthadbeenanocean 35 Whatbroughtaboutthis 36 changeinme?Thedeserthadn’tchanged37 Ihad.Ihadchangedmy 38 AndbydoingsoIchangedanunhappyexperienceintothemostamazing 39 ofmylife.IwasexcitedbythisnewworldthatIhaddicoveredIhadlookedoutofmyself-creatdedprisonand 40 thestars 32
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阅读下面短文掌握其大意然后从21—40各题所给的四个选项ABC和D中选出最佳选项并在答题纸上将该选项标号涂黑 DuringthewarmyhusbandwasstationedatanarmycampinadesertinCalifornia.Iwenttolivethereinordertobe21 him.Ihatedtheplace.Ihadnever 22 beensounhappy.Myhusbandwasorderedoutonalong-termdutyandIwasleftinatinyshack棚屋alone.Theheatwas 23 -almost1250Fevenintheshadeofacactus仙人掌24 asoultotalkto.Thewindblewnon-stopandallthefoodIateandtheevryairIbreathedwere 25 withsandsandsand! IwassosorryformyselfthatIwrotetomyparents.ItoldthemIwas 26 andcomingbackhome.IsaidIcouldn’tstanditoneminutelonger.I 27 beinprison!Myfatheransweredmy 28 withjusttwolines-twolinesthatwillalwayssinginmy 29 -twolinesthatcompletelychangedmylife: Twomenlookedoutfromprisonbars Onesawthemudtheothersawthestars Ireadthosetwolines 30 Iwasashamedofmyself.ImadeupmymindIwouldfindoutwhatwasgoodinmypresent 31 ;Iwouldlookforthestars Imadefriendswiththenativesandtheir 32 amazedme.Theygavemepresentsoftheirfavoriteartworkswhichtheyhad 33 toselltotoueists.Istudiedthedelightfulformsofthecactus.Iwatchedforthedesertsunsetsand 34 forseashellsthathadbeenlefttheremillionsofyearsagowhenthedeserthadbeenanocean 35 Whatbroughtaboutthis 36 changeinme?Thedeserthadn’tchanged37 Ihad.Ihadchangedmy 38 AndbydoingsoIchangedanunhappyexperienceintothemostamazing 39 ofmylife.IwasexcitedbythisnewworldthatIhaddicoveredIhadlookedoutofmyself-creatdedprisonand 40 thestars 24
阅读下面短文掌握其大意然后从21—40各题所给的四个选项ABC和D中选出最佳选项并在答题纸上将该选项标号涂黑 DuringthewarmyhusbandwasstationedatanarmycampinadesertinCalifornia.Iwenttolivethereinordertobe21 him.Ihatedtheplace.Ihadnever 22 beensounhappy.Myhusbandwasorderedoutonalong-termdutyandIwasleftinatinyshack棚屋alone.Theheatwas 23 -almost1250Fevenintheshadeofacactus仙人掌24 asoultotalkto.Thewindblewnon-stopandallthefoodIateandtheevryairIbreathedwere 25 withsandsandsand! IwassosorryformyselfthatIwrotetomyparents.ItoldthemIwas 26 andcomingbackhome.IsaidIcouldn’tstanditoneminutelonger.I 27 beinprison!Myfatheransweredmy 28 withjusttwolines-twolinesthatwillalwayssinginmy 29 -twolinesthatcompletelychangedmylife: Twomenlookedoutfromprisonbars Onesawthemudtheothersawthestars Ireadthosetwolines 30 Iwasashamedofmyself.ImadeupmymindIwouldfindoutwhatwasgoodinmypresent 31 ;Iwouldlookforthestars Imadefriendswiththenativesandtheir 32 amazedme.Theygavemepresentsoftheirfavoriteartworkswhichtheyhad 33 toselltotoueists.Istudiedthedelightfulformsofthecactus.Iwatchedforthedesertsunsetsand 34 forseashellsthathadbeenlefttheremillionsofyearsagowhenthedeserthadbeenanocean 35 Whatbroughtaboutthis 36 changeinme?Thedeserthadn’tchanged37 Ihad.Ihadchangedmy 38 AndbydoingsoIchangedanunhappyexperienceintothemostamazing 39 ofmylife.IwasexcitedbythisnewworldthatIhaddicoveredIhadlookedoutofmyself-creatdedprisonand 40 thestars 22
Inthisarticleyouneedtobackupgeneralstatementswithexamples.
Itisimportanttopayyourelectricitybillontimeaslatepaymentsmayaffectyour.
研究人员对珍珠贝2n有丝分裂和减数分裂细胞中染色体形态数目和分布进行了观察分析图1为其细胞分裂一个时期的示意图仅示部分染色体图2中细胞类型是依据不同时期细胞中染色体数和核DNA分子数的数量关系而划分的请回答下列问题 1图1中细胞分裂的方式和时期是它属于图2中类型的细胞 2若某细胞属于类型c取自精巢没有同源染色体那么该细胞的名称是 3若类型bde的细胞属于同一次减数分裂那么三者出现的先后顺序是 4在图2的5种细胞类型中一定具有同源染色体的细胞类型有 5着丝点分裂导致图2中一种细胞类型转变为另一种细胞类型其转变的具体情况有用图中字母表述 6珍珠贝卵母细胞分裂一般停留在减数第一次分裂中期待精子入卵后完成后续过程 细胞松弛素B能阻滞细胞分裂而导致染色体数加倍可用于诱导三倍体现有3组实验用细胞松弛素B分别阻滞卵母细胞的减数第一次分裂减数第二次分裂和受精卵的第一次卵裂请预测三倍体出现率最低的是理由是
阅读下面短文掌握其大意然后从21—40各题所给的四个选项ABC和D中选出最佳选项并在答题纸上将该选项标号涂黑 DuringthewarmyhusbandwasstationedatanarmycampinadesertinCalifornia.Iwenttolivethereinordertobe21 him.Ihatedtheplace.Ihadnever 22 beensounhappy.Myhusbandwasorderedoutonalong-termdutyandIwasleftinatinyshack棚屋alone.Theheatwas 23 -almost1250Fevenintheshadeofacactus仙人掌24 asoultotalkto.Thewindblewnon-stopandallthefoodIateandtheevryairIbreathedwere 25 withsandsandsand! IwassosorryformyselfthatIwrotetomyparents.ItoldthemIwas 26 andcomingbackhome.IsaidIcouldn’tstanditoneminutelonger.I 27 beinprison!Myfatheransweredmy 28 withjusttwolines-twolinesthatwillalwayssinginmy 29 -twolinesthatcompletelychangedmylife: Twomenlookedoutfromprisonbars Onesawthemudtheothersawthestars Ireadthosetwolines 30 Iwasashamedofmyself.ImadeupmymindIwouldfindoutwhatwasgoodinmypresent 31 ;Iwouldlookforthestars Imadefriendswiththenativesandtheir 32 amazedme.Theygavemepresentsoftheirfavoriteartworkswhichtheyhad 33 toselltotoueists.Istudiedthedelightfulformsofthecactus.Iwatchedforthedesertsunsetsand 34 forseashellsthathadbeenlefttheremillionsofyearsagowhenthedeserthadbeenanocean 35 Whatbroughtaboutthis 36 changeinme?Thedeserthadn’tchanged37 Ihad.Ihadchangedmy 38 AndbydoingsoIchangedanunhappyexperienceintothemostamazing 39 ofmylife.IwasexcitedbythisnewworldthatIhaddicoveredIhadlookedoutofmyself-creatdedprisonand 40 thestars 28
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