A-A+
The passage mainly talks about ______.A．the ef
问题详情
The passage mainly talks about ______.
A．the effect of diseases
B．how to control the number of certain animals
C．the relationship between diseases and human population
D．different kinds of diseases
参考答案
正确答案：A
解析：通览全文，文章谈了 disease 的作用，例如第一段"Disease can be one of the most powerful factors in checking population growth." 第二段"Apart from regulating population numbers in other species, disease has probably been the greatest factor in controlling the growth of the human population."
