A:There is a plant behind the bike.
B:There is a plant beside the bike.
已知Rt△ABC中,∠C=90°,若a+b=14cm,c=10cm,则Rt△ABC的面积是( )
如图,图1表示一粒浸软的菜豆种子,某同学用刀片在图中虚线处将种子切断,并画出了横断面的示意图(如图2所示).下列叙述中错误的是 ( )