出版说明
本书使用说明
Unit1Explorers
Lesson1BurkeandWills:AcrossAustralia
Lesson2AlexandraDavid-Neel:AFrenchWomaninTibet
Lesson3VitusBering:AcrossSiberiatoNorthAmerica
Lesson4RobertScott:ARacetotheSouthPole
Lesson5IntotheDeep:OceanExploration
ExtensionActivities
VideoHighlights:CNNVideo,DeepSeaExploration
ActivityPage:AdventureTrail
DictionaryPage:UnderstandingDefinitions
Unit2WorldIssues
Lesson1WorldPopulationGrowth
Lesson2ChangesintheFamily
Lesson3WomenandChange
Lesson4RainForests88
Lesson5TheGarbageProject
ExtensionActivities
VideoHighlights:CNNVideo,LalitasStory
ActivityPage:CrosswordPuzzle
DictionaryPage:WorkingwithWordForms
Unit3AMishmash,orHodgepodge
Lesson1Roadrunners
Lesson2AfraidtoFly
Lesson3LanguagesandLanguageDiversity
Lesson4Skyscrapers
Lesson5Left-Handedness
ExtensionActivities
VideoHighlights:CNNVideo,TheGreenSkyscraper
ActivityPage:FamiliarPhrases165
DictionaryPage:UnderstandingGrammarCodes
Unit4Science
Lesson1BiospheresinSpace
Lesson2Earthquakes
Lesson3SnowandHail
Lesson4PhotovoltaicCells:EnergySourceoftheFuture
Lesson5BiologicalClocks
ExtensionActivities
VideoHighlights:CNNVideo,OzoneDepletion
ActivityPage:ChemicalCrosswordPuzzle
DictionaryPage:DoingDictionaryResearch
Unit5MedicineandHealth
Lesson1Headaches
Lesson2SleepandDreams
Lesson3HealthCareandEpidemics
Lesson4Medicine:FromLe‘echestoLasers
Lesson5CholesterolandHeartDisease
ExtensionActivities
VideoHighlights:CNNVideo,TheSingingDoctor
ActivityPage:WhoSaidWmat?
DictionaryPage:LearningAboutWordStress
UnitQuiz
Vocabulary
SkillsIndex
VideoTranscripts