By mentioning obesity epidemic, the author intends to______. A．state the seriousness of this problem B．prove the influence of Lamarck's theory on people's health C．demonstrate experts still cannot figure out the reason for it D．explain the genetic cause that lies in it
A. A．state B.prove C.demonstrate D.explain
【参考答案】
B 属逻辑关系题。题目中的内容出现在第三段第四句，第三段的第二句就是本段的核心观点，因此肥胖的例子也是对此的说明......