题目内容:
Thosewhoholdthetheory"meta-populationdynamics"believethatmigration_____.
A.doesmoreharmthangoodtoanimalpopulations B.keepslocalanimalsandinsectshealthy
C.haslittleeffectonanimalpopulations
D.helpslocalanimalpopulationstogrow
参考答案:
答案解析: