A:10
B:10
C:27
D:10或27
某野外调查小组对某地区种群进行深入调查,获得了下面有关信息资料.如图表示某物种迁到一个新环境后,其总群数量的变化情况.
— How many students will join in the sports meeting next week?
—About two hundred. They are all excellent athletes.