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利用暑假准备实地考察我国境内已知的最早人类遗址，他应该去（）。

A. 陕西省
B. 北京市
C. 云南省
D. 浙江省

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TheeconomyoftheUnitedstatesafter1952wastheeconnomyofawell-fed,almostfullyemployedpeople.Despitoccasionalalarms,thecountryescapedanypostwardepressionandlivedinastateofboom.Aneconomicsurveyoftheyear1955,atypicalyearofthe1950’s,maybetypicalasillustratingtherapideconomicgrowthofthedecade.Thenationaloutputwasvalueat10percentabovethatof1954(1955outputwasestimatedat392billiondollars).Theproductionofmanufacturerswasabout40percentmorethanithadaveragedintheyearsimmediatelyfollowingWorldWar2.Thecountry’sbusinessspentabout30billiondollarsfornewfactoriesandmachinery.Nationalincomeavailableforspendingwasalmostathirdgreaterthanithadbeenithadbeenin1950.Consumersspentabout256billiondollars;thatisabout700milliondollarsaday,orabouttwenty-fivemilliondollarseveryhour,allroundtheclock.Sixty-fivemillionpeopleheldjobsandonlyalittlemorethantwomillionwantedjobsbutcouldnotfindthem.Onlyagriculturecomplainedthatitwasnotsharingintheroom.Tosomeobserversthiswasanominousechoofthemid-1920’s.Asfarmer’sshreoftheirproductsdeclined,marketingcostsrose.Buttherewere,amongtheobserversofthenationaleconomy,afewwhowerenotasconfidentasthemajority.Thosefewseemedtofearthattheboomcouldnotlastandwouldeventuallyleadtotheoppsite-depression.Whatisthebesttitleofthepassage?（）

A. TheAgriculaturalTrendsof1950’s
B. TheUnemploymentRateof1950’s
C. Economyinthe50’s
D. TheFederalBudgetof1952

在进入受限空间作业之前必须检测分析受限空间内（）。

A. 氧含量及有毒易燃气体含量
B. 氧含量
C. 空气含量
D. CO含量

《淮北矿业2015年绩效考核办法》规定，对年度未能按计划要求完成效率（精煤产率、产销率、融资任务）、效益（盈亏、成本、经费、应收款、采购价格）考核指标的单位，给予责任单位领导班子集体诫勉谈话并通报批评，党政正职和分管副职（）。

A. 警告
B. 记过
C. 记大过
D. 严重警告

TheeconomyoftheUnitedstatesafter1952wastheeconnomyofawell-fed,almostfullyemployedpeople.Despitoccasionalalarms,thecountryescapedanypostwardepressionandlivedinastateofboom.Aneconomicsurveyoftheyear1955,atypicalyearofthe1950’s,maybetypicalasillustratingtherapideconomicgrowthofthedecade.Thenationaloutputwasvalueat10percentabovethatof1954(1955outputwasestimatedat392billiondollars).Theproductionofmanufacturerswasabout40percentmorethanithadaveragedintheyearsimmediatelyfollowingWorldWar2.Thecountry’sbusinessspentabout30billiondollarsfornewfactoriesandmachinery.Nationalincomeavailableforspendingwasalmostathirdgreaterthanithadbeenithadbeenin1950.Consumersspentabout256billiondollars;thatisabout700milliondollarsaday,orabouttwenty-fivemilliondollarseveryhour,allroundtheclock.Sixty-fivemillionpeopleheldjobsandonlyalittlemorethantwomillionwantedjobsbutcouldnotfindthem.Onlyagriculturecomplainedthatitwasnotsharingintheroom.Tosomeobserversthiswasanominousechoofthemid-1920’s.Asfarmer’sshreoftheirproductsdeclined,marketingcostsrose.Buttherewere,amongtheobserversofthenationaleconomy,afewwhowerenotasconfidentasthemajority.Thosefewseemedtofearthattheboomcouldnotlastandwouldeventuallyleadtotheoppsite-depression.ItcanbeinferredthenationalfromthepassagethatmostpeopleintheUnitedStatesin1955viewedthenationaleconomywithanairof（）.

A. confidence
B. confusion
C. disappointment
D. suspicion