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1.mixv.-n.________2.concludev.-n._______cometoaconclusion3.reactv.-n._______4.equipment[U]5.partn.-adj.________6.balancen.-adj.______abalanceddiet7.astonishv.-adj._______-__________8.surprisev.-adj.______-adj._______9.solid/liquid/gas10.exist11.heatv.加热12.contract/expand13.man-made14.aquarter15.reactwith/to16.thereactionof...17.atthetopof18.atthebottomof19.add...to20.keep...outof...21.air-freewater22.goahead23.it'syourturn24.you'vegotit.明白25.usedtodosth26.fourtimesaterm27.intheareaof...在…领域mixtureconclusionreactionpartialbalancedastonishingastonishedsurprisingsurprised28.beproudof29.either....or...30.besupposedtodosth31.put...inorder1.Two-thirdsoftheearth'ssurfaceiswater.2.Theearthistwiceaslargeasthemoon.3.Theearthisforty-ninetimeslargerthanthemoon.4.Itishardtothinkofaworldwithoutmetals.5.Inthelasttwentyyears,sevenscientistshavewontheNobelPrize.