3、dinaryhouseholdincandescentlampisinnormallightThecurrentintensitythroughitisabout()A,2x102,B,2x10,C,2x10-1,D,2x10-23and1999willreturntothemotherlandofMacaoThetemperaturezoneandthedrywetzonearerespectively()A,subtropicalzone,humidzone,B,tropicalandhumidareaC,su
4、btropical,semihumidareaD,tropicalandsemihumidarea4.ThefollowinganimalsInhislifeTheuseofthreeorgansasarespiratoryorgan(theexchangeofbloodwiththeoutsideair)is()A,mammalianB,fishC,amphibianD,birds5,thefollowing:(1)coalcombustion;industrialemissionsarbitraryemissi
5、ons;setofffirecrackers;aircraft,automobileexhaustemissionsWhatmaycauseairpollutionis()A,onlyone,B,onlyC,onlyone,two,three,D,one,two,four6,refrigeratorrefrigerants,methylchlorideinthehighaltitudebyultravioletradiationtoproduceClatomsAndthefollowingreactions:Cl+
6、O3toClO+O2ClO+OtoCl+O2ThefollowingstatementisincorrectAandBarethecatalystsforthetotalreaction,andO3isconvertedintoO2afterthereactionCandClatomsarethecatalystsforthetotalreaction,andDandClatomsdecomposeO3repeatedly7.Onaflathighway,thespeedofabicyclerunningataco
7、nstantspeedisabout0.02timesthetotalweightofthecarTherider'spowerisclosesttothatofthecyclistA,5wattsB,50wattsC,500wattsD,1kW8,summerThehighesttemperatureinourprovinceisnotat12:00noon,thestrongestsolarradiationIt's13:00-14:00intheafternoonThisismainlybecause()A,
8、urbanstreetshadeB,urbanstrokefasterC,alargepopulationinthecity,D,urbanbuildingmaterialshavelargerspecificheat9.AsshowninfigureC,theelbowisfilledwithwaterClosebothaandBvalvesVertica
