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(A)@bwQ gv͑RRvI{ (B)@bwQ gvRvI{ (C)@bwQ gv:ghvI{ (D)@bwQ gv:gh NI{ 750(W TNؚ^Nv Tvs Te\(ϑv Tv$N*NirSObQ N*Ns^b N*Nzv Nb Nzzl;R 1ubQ0R=0WǏ z-N NRl-Ncknxv/f (A)͑R[$NirSOZPRvI{ (B)͑R[$NirSOZPRvs^GWRsvI{ (C)$NirSOvRvXϑvI{ (D)$NirSO=0Wv:ghvI{ . 760N*NNz(WؚQ0WbhY bQN*N(ϑ:NmvirSO irSO=0Wes:Nv RN[irSO@bZPvRI{Nzzl;R N A mgv B  EMBED Equation.3 mv2 C  EMBED Equation.3 mv2 mgh D mgh  EMBED Equation.3 mv2 770(ϑ:NmvirSO1uؚY1u N= p`=(WzvV[N0Wbv{9_'|v Nz (WS)9_'|0RgwvǏ z-N Nbl-Ncknxv/f (A)irSOvR^\HQQ\TX'Y (B)irSOvR^\HQX'YTQ\ (C)irSOv^\HQQ\TX'Y (D)irSOv^\HQX'YTQ\ 780(WZP:gh[R`[_[e bN;`/fNQagSb Npv~&^-N QNagegۏLKmϑ sQN~&^ bN Nlcknxv/f (A)^S_ bpnpf yr+R/f,{Npl gbbagv~&^ (B)_{ (u,{1pN,{2pcя2mmv~&^ (C)(upepBle Q(ulQ_Vn=g(n 1)TBl^e Mb (u,{1N,{2$Npݍycя2mmv~&^ (D)(ulQ_ EMBED Equation.3 b EMBED Equation.3 Bl^e ~&^eSN NQ,{1pN,{2p$Npݍy/f&Tcя2mm 790Sbih:g͑$v(ϑ:N250kg,b[cGS0Ry0Wbvؚ^:N10mY1uYbkʑ>e, Nzzl;RBl (1) ͑$ N=4 mevR. (2) ͑$ N=0RYؚY, ͑$vRTRvI{? 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