问题是：depends on assuming which one ? 答案是：The bottom of the lake does not contain toxic remnants of earlier pollution that stirred into the water by pipeline construction.
我选的是：Damage to the lake's fish populations would be the only harm that a leak of oil from the pipeline would cause. 因为没有其他因素影响鱼类的树木，所以防止有的泄漏就可以了，这个选项哪里错了？求解！作者: dengts 时间: 2011-4-16 09:14
please paste the whole problem,including all 5 choices...