山西省2023年高二年级上学期9月联考数学.试卷答案,我们目前收集并整理关于山西省2023年高二年级上学期9月联考数学.得系列试题及其答案,更多试题答案请关注微信公众号:趣找答案/直接访问www.qzda.com(趣找答案)
山西省2023年高二年级上学期9月联考数学.试卷答案
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46.C她教育我要感激(gratefulfor)我生活中拥有的一切
47.B当我未能(failed)被选为学校啦啦队成员的时候,我很是心烦意乱
48.D的确如此,我成为(became))国家级体操运动员
49.A这位曾经拒绝叫我任何名字除了她的“小兔子”的妇人(woman),现在连我的名字甚至都记不得了
50.C不久,直到我唱起FrankSinatra的《带我飞向月球》时她才记得我
她眼里闪烁着认知(recognition)的小火花是我所期待(expected)的
51.B解析见上题
52.C一天,这微光完全(completely)从她的眼里消失了
53.C我听到她微弱地(weakly)哼着《带我飞向月球》
54.A那是我最后一次听到她的声音(voice)),但是我将永记心中
55.C当奶奶离开(left)的时候,她带着我童年的一段记忆
56.whose57.in58.a59.her60.getting/toget61.preference62.tomake/making63.havebeenworking64.merely65.appreciative第一节Onepossibleversion:NoticeInordertosatisfyyourthirstforknowledgeabouttheSilkRoad,ourschoolwillorganizearelevantlecture,whichisintendedforallyoustudentsintheInternationalDepartment.Itsdetailsareasfollows.Asplanned,thelecturewillbeheldfrom2:00to4:00inourschoollecturehallthisThursdayafternoon.ProfessorWangwillbeinvitedtogiveavividdescriptionabouttheSilkRoad.I'msureyou'llhaveabetterunderstandingoftheancientChinesecultureandeconomy,whichwillsurelyhaveyourknowledgewidenedandyourhorizonbroadened.Afterthelecture,youarewelcometoraisequestionsactively.Byallmeans,Mr.Wangwillbegladtocommunicatewithyouuntilyouaresatisfied.Besuretoattenditontime.Idaresayyouwillgainalotfromit.StudentUnionOctober24,2022第二节Onepossibleversion:Thoughalittlescared,Tommadeuphismindtofindtheanimal.Quietly,hebeganfollowingthefootprints.Hedidn'twanttoscaretheanimalaway.Therewasnothinginsightexceptthestrangefootprints.Suddenly,thereseemedtobesomestrangesoundsahead.Tomstoppedandlistenedcarefully.Itcamefromthebackyard.Thrilled,mixedwithafeelingofalittlefright,hequickenedhispace!Thesoundsbecameclearerandclearer.Holdinghisbreath,Tompeekedaroundthecornerofthehouse.Itturnedoutthathissisterwasmakingthesounds.Shehadsomethingwornonbothfeet.Shewaswalkingonthesnowbackandforthhappily.Noticingherbrother,Lucywavedexcitedly,"SeewhatIfoundinAuntGwen'sbasement?Theyareold-fashionedsnowshoes.AuntGwensaidtheshapehelpedwalksteadilyonthesnow.Andthatistrue!"Tomthenlaughed,"NowonderIcouldn'tfindthosefootprintsinAuntGwen'sbook.Therewasnopageforasnowshoeingsister.【高二第一学期期中质量检测·英语参考答案第4页(共4页)】23022B
分析首先画出可行域,求出x+y的最大值,然后求z的最大值.
解答解:不等式组表示的平面区域如图当直线a=x+y过A时a最大,即z最大,
由$\left\{\begin{array}{l}{x+3=2y}\\{y=2x}\end{array}\right.$得A(1,2)
所以${z}_{max}=(\sqrt{2})^{1+2}=2\sqrt{2}$;
故答案为:2$\sqrt{2}$.
点评本题考查了简单线性规划问题;关键是画出平面区域,利用目标函数的几何意义求最值.
山西省2023年高二年级上学期9月联考数学.