一个圆形跑道长300米,沿道路每隔6米栽一棵树,跑道周围共栽了______棵树.
300÷6=50(棵);
答:跑道周围共栽了50棵树.
故答案为:50.
We three are good friends. We like skating. [ ]
A. all
B. either
C. both
伊斯俩目是什么意思?