题目
【题文】 When the explorers first set foot upon the continent of North America, the skies and lands were alive with an astonishing variety of wildlife. Native Americans had taken care of these precious natural resources wisely. Unfortunately, it took the explorers and the settlers who followed only a few decades to decimate a large part of these resources. Millions of waterfowl were killed at the hands of market hunters and a handful of overly ambitious sportsmen. Millions of acres of wetlands were dried to feed and house the ever-increasing populations, greatly reducing waterfowl habitat.What was a cause of the waterfowl population decline in North America? A．Loss of wetlands. B．Popularity of water sports. C．Pollution of rivers. D．Arrival of other wild animals.
【题文】 When the explorers first set foot upon the continent of North America, the skies and lands were alive with an astonishing variety of wildlife. Native Americans had taken care of these precious natural resources wisely. Unfortunately, it took the explorers and the settlers who followed only a few decades to decimate a large part of these resources. Millions of waterfowl were killed at the hands of market hunters and a handful of overly ambitious sportsmen. Millions of acres of wetlands were dried to feed and house the ever-increasing populations, greatly reducing waterfowl habitat.
What was a cause of the waterfowl population decline in North America?| A．Loss of wetlands. | B．Popularity of water sports. |
| C．Pollution of rivers. | D．Arrival of other wild animals. |
题目解答
答案
【答案】A
解析
步骤 1：理解背景信息
文章描述了北美洲早期探险者和定居者对野生动物资源的破坏，特别是水禽数量的减少。文章提到，数百万英亩的湿地被排干，以满足日益增长的人口对食物和住房的需求，这大大减少了水禽的栖息地。
步骤 2：分析问题
问题询问导致北美洲水禽数量减少的原因。根据文章内容，水禽数量减少的原因是湿地被排干，导致水禽栖息地减少。
步骤 3：选择正确答案
根据文章内容，湿地被排干是导致水禽数量减少的原因，因此正确答案是A选项，即湿地的丧失。
文章描述了北美洲早期探险者和定居者对野生动物资源的破坏，特别是水禽数量的减少。文章提到，数百万英亩的湿地被排干，以满足日益增长的人口对食物和住房的需求，这大大减少了水禽的栖息地。
步骤 2：分析问题
问题询问导致北美洲水禽数量减少的原因。根据文章内容，水禽数量减少的原因是湿地被排干，导致水禽栖息地减少。
步骤 3：选择正确答案
根据文章内容，湿地被排干是导致水禽数量减少的原因，因此正确答案是A选项，即湿地的丧失。