1.1825年，（）修建了第一条铁路。

I.LanguageKnowledge.(1x5=5)1.Theobjectinthesentence“ShewishestolearnEnglishfromyou.”is____.

II.Reading.(2x4=8)TheUnitedStatesandCanadahaveagreedtokeeptheirsharedborderclosedfornonessentialtravelforanother30daystopreventthespreadofthecoronavirus.CanadianPrimeMinisterJustinTrudeauannouncedtheextensionduringabriefingSaturdayinOttawa.Therestrictionsontheworld’slongestfrontiertookeffectonMarch21,whileallowingtradeandothertraveldeemedessentialtocontinue.Thepartialbanwastoexpiresoon,buttheneighboringcountrieshavedecideditisnotsafetoallowtraffictofullyresume.“Thisisanimportantdecisionandonethatwillkeeppeopleonbothsidesofthebordersafe,”Trudeautoldanewsconferenceoutsidetheresidencewherehehasbeenlivingandworkinginrecentweeks.Canada,withapopulationofunder38million,hashadmorethan32,000casesofinfectionand1,340deathsfromCOVID-19,asofSaturday.TheU.S.hasidentifiedalmost720,000casesandover37,000deaths,asoflateSaturdayafternoon.SeveralofAmerica’shardest-hitareasincludingNewYorkstateshareaborderwithCanadianprovinces.Bothcountrieshavetestingshortages.Bordercrossingshavefallendramatically,evendespitetheessentialtravelexemptions.AtthePeaceBridgebetweenBuffalo,N.Y.,andFortErie,Ontario,“passengertraffic[is]down95%,bustrafficdown...99.6%,soessentially,it’sshutdown,”KathrynFriedman,aglobalfellowattheWilsonCenter’sCanadaInstitute,saidinaconferenceTuesday.“Commercialtrafficisdownalittleover28%.”“Itissurrealtoseesuchlittletraffic,”RonRienas,whorunstheauthoritythatmanagesthePeaceBridge,toldTheBuffaloNews.SinceApril1,tunneltrafficbetweentheheavilyintegratedDetroitandWindsor,Ontarioregionsisdown88%overthesameperiodlastyear,accordingtoFriedman.ConcernshaveriseninCanadaaboutdailytripsbyaround1,600healthcareworkersfromOntariotohard-hitDetroit.SomenurseswhoworkinfacilitiesinboththeU.S.andCanadahavehadtochooseone.Theextensionoftheborderrestrictionscameafteraweekinwhichthegovernmentsgavemixedsignalsaboutthenextstep.PresidentTrumpsaidonWednesdaythattheCanadianborder“willbeoneoftheearlyborderstobereleased.Canadaisdoingwell.We’redoingwell.”Butthenextday,PrimeMinisterTrudeautoldreporters,“Thereisasignificantamountoftime,still,beforewecantalkaboutlooseningsuchrestrictions.”6.WhendidTrudeauannouncetheextension?

某解释变量和被解释变量之间的相关系数为-1.2，说明二者之间存在负相关关系

4.德国甲公司先后于6月1日和6月8日分别向中国乙公司邮寄一份不可撤销的要约通知和一份撤回要约的通知。乙公司在6月11日收到甲公司的要约通知后，当天即电话通知甲公司表示接受，并于6月16日再次向甲公司邮寄一份确认函。6月20日，乙公司收到甲公司的撤回通知，甲公司则收到乙公司的确认函。依公约，甲乙公司之间的合同：

1.建立了美学学科、被称为“美学之父”的德国哲学家、美学家是（）。

8.下列说法正确的是（）。

集合A={0，1}，A的子集有（）个

在某台PC上运行ipconfig/all命令后得到如下结果，下列说法中正确的是（1）。WindowsIPConfigurationHostName...............:MSZFA2SWBGXX4UTprimalyDnsSuffix.......：NodeType...............:HybridIPRoutingEnable。.........:NoWINSProxyEnable........:NoDNSSuffixSearchList......:homeWirelessLANadapter:Connection-specificDNSSuffix.:homeDescription..............:RealtekRTL8188EUNetworkAdapterPhysicalAddress............:30-B4-9E-12-F2-EDDHCPEnable..............:YesAutoconfigurationEnabled...:YesLink-localIPv6Address......:fe80::40bl:7a3a:6cd2:1193%12(peferred)IPv4Address.............:192.168.3.12(preferred)Subnetmask...............:255.255.255.0LeaseObtaine............:2017-7-1520:01:59LeaseExpires...............:2017-7-1620:01:59DefaultGateway..........:192.168.3.1DHCPServer.............:10.10.20.3DHCPv6IAID.....……..:222857938DHCPv6ClientDUID........:00-01-00-01-1F-88-22-5F-74-DO-2B-7B-88-29DNSServers................:8.8.8.8192.168.3.1NetBIOSoverTcpip..........:Enabled

在某班数学成绩中，70～80分一组的向下累计人数为50人，这50人是指（）。