还没有登录哦！
[Critical Reasoning]
试题详情
文章：
When there is less rainfall than normal, the water level of Australian rivers falls and the rivers fl ow more slowly. Because algae whose habitat is river water grow best in slow-moving water, the amount of algae per unit of water generally increases when there has been little rain. By contrast, however, following a period of extreme drought, algae levels are low even in very slow-moving river water.
题目：
Which of the following, if true, does most to explain the contrast described above?
选项:
A、During periods of extreme drought, the populations of some of the species that feed on algae tend to fall. The more slowly water moves, the more conducive its temperature is to the growth of algae
B、When algae populations reach very high levels, conditions within the river can become toxic for some of the other species that normally live there.
C、Australian rivers dry up completely for short intervals in periods of extreme drought
D、Except during periods of extreme drought, algae levels tend to be higher in rivers in which the fl ow has been controlled by damming than in rivers that fl ow freely.
答案:
D
提问：
题目能看懂，但选项排除不了，能一一解答一下各个选项吗？
解答：
点赞1
阅读1606
提问：
题目能看懂，但选项排除不了，能一一解答一下各个选项吗？
解答：
点赞1
阅读1607
提问：
请英吉老师回答下～
文中推理结论是：在极度干旱的情况下，水流缓慢，河藻很多。答案D中，极度干旱情况下，河水彻底干枯了。这样的话答案不是和原文的限定相反了吗？
解答：
点赞0
阅读1715
问个问题
注册太麻烦？点这里查看免费答疑吧！
博币不足
加"GMAT小百科"小智微信
直接送200
