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发表于:2019-08-28
问题详情:动能相等质量不等的两个物体A、B,mA>mB,A、B均在动摩擦相同的水平地面滑行,滑行距离分别为sA、sB后停下,则A.SA>SB B.A克服摩擦力做功较多 C.SA<SB D.b克服摩...
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发表于:2018-05-06
LiketheGreenMamba,theCopperheadisequippedwiththenewinternalhydro-drivepedallingsystem.TheBlackMambaisthemostdeadlysnakeintheworld.SituateddinLimpopoProvince,SouthAfrica,t...
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发表于:2018-09-12
Theblackmambahasnospecialconservationstatus.Sheputablackmambainhiscamper.Theblackmambaisadeadlypoisonoussnakes,whydoItakethisname?BecauseIonceenteredthestadium,I'mdeadly...