cannot live without oxygen. Pure oxygen is provided for .

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问题 ______ cannot live without oxygen.
Pure oxygen is provided for ______ .

选项 A、research workers in high mountains
B、children
C、patients
D、both A and C

答案D

解析本题题干问“纯氧经常是提供给谁”。原文第1段第3句话指出医院里的病人和在山区工作的研究人员需要纯氧。因此选项D．both A and C是正确答案。

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本试题收录于：大学英语三级B级题库大学英语三级分类

大学英语三级B级

大学英语三级

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cannot live without oxygen. Pure oxygen is provided for .

大学英语三级B级

大学英语三级

Helendidknowsomethings,though.Mostoftheseshehadlearnedfromhersenseoftouch.Shecouldfindherwayaroundthehou

A、40studentsattendedtheclass.B、Therewere33studentsintheclass.C、18boysshouldattendtheclass.D、Thereweremoregi

Thisisasetofrecommendationsfor.Thepatientsshouldbeaskediftheyare.

Thanksgivingisa(tradition)______festivalintheU.S.andCanada.

ThemostimportantholidayinChinaistheSpringFestival.PreparationsforNewYearbeginonthefinaldaysofthelastlunar

A、Director.B、Teacher.C、Father.D、Student.BW:Itoldyouthatyoushouldnotbelateforclass.M:Well,I’msorry.Thebusca

Iftheeconomygetsworse,weshallhaveto(tightly)______ourbelts.

HainanIslandCapital:HaikouPopulation:7millionWhattosee:WanquanRiverDongshanRidgeHotSprings

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Ifyouwanttobookahotelroom,youshoulddial.Tobuyanold-fashionedtable,oneshouldgoto.