Some people don’t like doing sports because they think it is hard work and will make____ (他们) feel tired . That’s wrong! Sports help us to____ (保持)healthy , happy and live longer .If you____ (从不) do sports , you will get unhealthy easily . Sports are____ (也)a good way to make friends .People from different____ (地方) may not know each other , but after a game , they often become good friends .And sports in winter and ____ (夏天)are not the same.____ __(swim) is fun in hot weather , while skiing is great____ cold days . Many people____ (享受) watching others play games .They often get very____ (兴奋) when “their” players or teams win .

在数轴上，点A所表示的实数为3，点B所表示的实数为a，⊙A的半径为2.下列说法中不正确的是（   ）

向量$\overrightarrow{a}=\left(2,3\right)$在向量$\overrightarrow{b}=\left(3,-4\right)$上的正射影的数量为（   ）

读“我国某地区农业资源利用评价表(单位：%)”，回答下列问题。