Một người nghe thấy tiếng sét sau 3 giây kể từ khi nhìn thấy chớp. Hỏi khoảng cách từ nơi đứng đến chỗ sét đánh là bao nhiêu? Biết vận tốc ánh sáng tuyền trong không khí là 300 000 000/s và vận tốc âm thanh trong không khí là 340m/s.

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I.Findthewordwhichhasadifferentsoundinthepartunderlined 1.A.childrenB.chickenC.sandwichD.chilli 2.A.cultureB.chapterC.featurelD.literature 3.A.chairB.architectC.cheeseD.child 4.A.advanceB.imperialC.academyD.around 5.A.emperorB.recognitionC.tabletD.temple II.Findwhichworddoesnotbelongtoeachgroup. 2.A.inB.behindC.betweenD.for 3.A.lecturerB.teacherC.professorD.locate 4.A.locatedB.visitedC.surroundedD.grown 5.A.teachB.locateC.learnD.study 6.A.centreB.culturalC.architectural D.historical 7.A.formB.establishC.foundD.find 8.A.juiceB.cheapC.chopD.jam 9.A.collegeB.villageC.universityD.highschool 10.A.cultureB.pagodaC.tombD.temple III.Choosethebestanswer. 1.ManybeautifulChamTowersinNinh ThuanProvince manydomesticandforeigntourists. A.restored-wereattractedC.wasrestored-attracted B.wererestored-attractD.restored-attracted 2.MinhMangTomb A.started-completedC.wasstarted-wascompleted B.started-wascompletedD.wasstarted-completed 3.Alotofflowers A.growB.grewC.growingD.Aregrown 4.PapersattheRoyalexaminationsinthepastwere A.passedB.correctC.checkD.graded 5.The TempleofLiterature things. A.issurrounded-containsC.issurrounded-iscontained B.surrounds-iscontainedD.surrounds-contains 6.In2003,four LeThanhTongandChuVanAnwerebuiltintheTempleofLiterature. A.formsB.statuesC.photosD.stonetablets 7.ThefirstDoctors'stonetablets andnow constructionin1841,and threeyearslater. inDaLatthroughouttheyear. bytheKing. byoldtreesand manyinteresting ofEmperorLyThanhTong,EmperorLyNhanTong,Emperor in1484. A.areerectedB.erectedC.waserectedD.wereerected 8.In2010,the82Doctors'stonetablets asaMemoryofthe World