高二英语Unit4Astronomy:thescienceofthestarsPart1TopicvocabularyVocabularyrevisionThereareapproximatelyfourhundredmillion_________银河系inthe______宇宙
Wecanseeonlyasmallpartofourgalaxy
Thereareoverthreebillionstarsin____________银河
Thesunisoneofthestars
Therearenine________行星(Mercury水星,Venus金星theEarth地球Mars火星Jupiter木星Saturn土星Uranus天王星Neptune海王星Pluto冥王星)aroundthesun
TheEarthisthethirdplanetfromthesun
TheEarthhasonenatural_________卫星--moon
ThemoonisonlyaquarterofthesizeoftheEarth
ShenzhouVChinesepeoplehavebeendreamingofgoinginto____________外太空eversincebefore
Chinahad____________发射three___________________无人飞船successfullyfrom1999to2005
31,2002,thelaunchofthefourthspacecraft"ShenzhouIV"wasanotherbigsuccessandthespacecraftreturnedtotheearthsafelyonJanuary5,2003
Duringitsflight,sevenscientificexperim