科技英语课后答案.doc,:"There'sRaviatthehomeofthatAmericandoctor."(Contractedform);"Awonderfulguy."(pletesentence);"Ravilookssweet,doesn'the?"(Questiontag).InthesecondparagraphofPassageOne,"it"refersto"touseinsecticideregularly,onaverylargescale."InthesecondparagraphofPassageTwo,"through"means"finish"plete.",,,,negativelychargedelectrons,,whichhaveapproximatelythesamemass,,parisontotheotherunits,,andthereforearepositivelyornegativelycharged,、(自动驾驶仪) (生物钟) (热核的) (地热的)(微波) (放射疗法) (光周期) (超导体)(远距离操纵器) (超显微/滤过性病毒) (农药) -(anic) -(radioactive)-(Hydrotherapy) 4.-free(caffeine-free)-(infrared)/ultra-(ultrared) -(monorail)-(Aerodynamics) 8.-fold(33-fold)-(g
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