内容正文:
书书书【!"(#1$)】【!"(#2$)】!"#$%&'()*(+*,-*./012345%&'()*2019—2020+,-.,/0123!"#$%&':1.2345:-6789:(;29:<=>?95=,;@1、2AB35%,C@3-1、3-2、3-5AB65%)。2.D3E=#ⅠE(CFG)H#ⅡE(%CFG)I8=,7EJ=110=。23KL90=M。NGO,2PQ;RST<UV、W2XYZ[\]^_NG`a。3.bN#ⅠEK,CcdeGNfg,hijkNG`almGn<NfoYpq。rstu,hvwxyzg,{Cp|}NfoY。^_D3Ea~。4.bN#ⅡEK,RNf^_NG`a。^_D3Ea~。5.23g,RD3EHNG`b。(Ⅰ#()*+40,)-、)*+:.+/100+,10+4,。210+34567)'8,(1~6+9:-';<+=>?,(7~10+:@';<+=>?。AB)C5D4,,)CEFA5D2,,:)G5D0,。1.H,<A.e<ScB.,¡¢Kc£¤C.¥¦Hβ<D§¨©,ª«_9<¬®¯D.°±²<³´µ¶·¸¹º»²g,_¼½/¸¹K,¾c·<¿ÀÁe´µ·<¿À!2.rÂÃÄ,eÅ_ÆÇ?θ<ÈÁ·ÉÊËa,hÌÊ˼a、e?F<ÍÎŰÏÐѲ;ÒRÓhÍt?ÔÕ¼Ö,×ÎeÅÏÐ_ÊËa,ØÔÕ¼Ö<Íem?A.FsinθB.FsinθC.FcosθD.Fcosθ3.¶³P/¸¹,rÙÚ¨<uÛ,ÜÝÞß"àáâA.³´µã·B.³Ú¨äåæçÛC.³<¨èÛD.³é-/¼½/¸¹4.êë,ìeíîï12m/s<ðñ_Õò<óôaõö,÷}øOùêúûìüî_ïý<ðñþð¼OõöK,ÿ!"î#þ$ð%u,$ð%u4s,Iî&'(û)*,+,KL9eíî%u<-.?40m,Ø+,KL9üî%u<-.?A.32mB.28mC.24mD.20m5.2019,1/3010K26=,123Y456¢789_/Å:Ë;C89<,=>“?@”6ABCbãDE#FG-.HI</:JKÂ,LMãNO/:<PQËR。Sâ