山东省
人教版九年级下册英语（新目标）配套练习册答案
Unit9whenwasitinvented?
SectionA
一：1.invented2.invention3.adjustable4.heat5.slippers二：1~5CBCCC
三：1.What,usedfor2.Who,invented3.is,cleaned4.must
berepaired5.tosee
SectionB
一：1.notice2.salty3.produced4.remain5.pleasant
二:2.toothin2.byaccident3.Accordingto,wasdiscovered4.by
mistake5.inthisway,intheend6.fellinto三:1~5:AADCD6~10:BDBDC11~12:AC
四:for,on,Who,think,are,inwentions,is,most
SelfCheckandReading
一:1.century2.knock3.below4.wooden5.towards6.
developing7.divided8.active9.aim10.create
二:1.helpful2.invention3.salt4.themostpopular5.safety
6.wood
三:1.Itisbelieved2.named3.tolearn4.wassent5.was
handedin6.Was,cleaned7.foundhim8.Whenwas,invented
四:1~5:BADBA6~10:CADAB
五:1~5:ABCAC
6.Hegrewvegetablesinhisgardenandsoldthem.Withthe
moneyhesetupachemicallab.
7.Yes.Becausehewasawarded1368separateanddistinct
patentsduringhislifetime.
8.February11th,18479.October18th,193110.America
11.Builtalab12.1368
