gwd6-10

xirui2000

Grasslands support

high densities of tigers, which fight and

sometimes kill sloth bears; sloth bears

(50) also coexist with and have been killed

by tree-climbing leopards, and are often

confronted and chased by rhinoceroses

and elephants, which can topple trees.

Collectively these factors probably

(55) selected against tree-climbing as a

defensive strategy for sloth bear cubs.

Q10:

The author mentions rhinoceroses and elephants (lines 52-53) primarily in order to

1. explain why sloth bears are not successful foragers in grassland habitats
2. identify the predators that have had the most influence on the behavior of sloth bears
3. suggest a possible reason that sloth bear cubs do not use tree-climbing as a defense
4. provide examples of predators that were once widespread across the Indian subcontinent
5. defend the assertion that sloth bears are under greater threat from dangerous animals than are other bear species

The answer is D, but why C is not correct?

xirui2000

谢谢，确实是这个标志，我后来也看到了，不过这在考例子来说是比较少见的,一般都在前面叙述，再引例子.

windfalls

一般来说，in order to题型是伴随着一个事实或者事例出现在文章中的，

也就是说作者引用这个事例或事实是为了说了一种道理或者看法，那么一般

这个事实或事例就会出现在道理或看法的前面或紧跟这个看法，所以一般解答这类题型就要在事例的附近寻找答案。

看这道题：

Collectively these factors probably selected against tree-climbing as a defensive strategy for sloth bear cubs.

这句话很关键，作者在前面举了tree-climbing leapords,然后说elephant 和犀牛can topple the trees, 最后用collectively these factors来指前面的列举，说明tree-climbing不是一个很好的defensive strategy.

所以C选项正确。不知道说的是否清楚，欢迎交流。

elitist

这道题的正确答案就是C，E不对.

efficiency

这题我选了E，我认为大象，犀牛和其他的如tiger都用来说明sloth bear处于的环境危险，如果选C似乎不符合例子说明问题的目的，选C的话tiger这个因素怎么去理解，因为tiger这个因素跟树没有一点关系，请教牛牛，谢谢!!