Unless tiger hunting decreases, tigers will soon be extinct in the wild. The countries in which the tigers’ habitats are located are currently debating joint legislation that would ban tiger hunting. Thus, if these countries can successfully enforce this legislation, the survival of tigers in the wild will be ensured.
The reasoning in the argument is most vulnerable to criticism on the grounds that the argument
A. assumes without sufficient warrant that a ban on tiger hunting could be successfully enforced
B. considers the effects of hunting on tigers without also considering the effects of hunting on other endangered animal species
C. fails to take into account how often tiger hunters are unsuccessful in their attempts to kill tigers
D. neglects to consider the results of governmental attempts in the past to limit tiger hunting
E. takes the removal of an impediment to the tigers’ survival as a guarantee of their survival
为啥选E作者: arthurman 时间: 2010-12-19 07:13
再说一句，我读完题就想到颁布了规定但不一定实施，所以选了A
现在看来理解选项有错作者: sbjqbS 时间: 2010-12-19 21:04
这应该是充分条件和必要条件的问题。
Unless tiger hunting decreases, tigers will soon be extinct in the wild. --- 说明减少打猎是必须的（必要条件）。
