air purification technique

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考题 Hepatitis A can be contracted through the following routes except ( ) . A、waterB、stoolC、foodD、air

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考题下面哪种天线可视为“特殊”全向天线?A、AIR-ANTl728B、MR-ANT3338C、AIR-ANT2485P-RD、AIR-ANT32 1 3A．B．C．D．

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考题 The condensers located in various stages of a flash evaporator are cooled by( ).A.distillateB.seawaterC.brineD.air

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考题 _________________A. ideas B. ambitious C. achievement D. technique

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考题 During the SARS period,it is especially important to ventilate the room.A: dust B: clean C: remove D:air

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考题 _________A.garden B.tree C.land D.air

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考题 Mr. McNeil asked Mr. Don Bradley to ship the goods（）air.AbyBonCatDin

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考题 Such problem （）air, water, and noise pollutions are becoming more and more serious in some big cities.AlikeBasCofDabout

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考题 technique

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考题 technique的中文意思是？A．技术B．性质，特色C．化学D．平衡的

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