已知一双层交流绕组的极距τ=15槽,今欲利用短距消除5次谐波电势,其线圈节距y应设计为:()。
A
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In1950,oneoftheleadingAmericanwriters()wasawardedtheNobelPrizefortheanti-racistIntruderintheDust.
TheAdventuresofTomSawyerand,especially,itssequence()provedthemselvestobethemilestoneintheAmericanliterature.
Thedevastatingfloodsanddroughtsthatimposedarecurrenttaxofsufferingonthefarmersnolongeroccur.Egyptianagriculturehasbeentransformed,andindustryisbenefitingfrompowergeneratedbythedam.()
Greatlyandpermanentlyaffectedbythe()experiences,Hemingwayformedhisownwritingstyle,togetherwithhisthemeandhero.