[]甘肃省武威第二中学2019届高三上学期第三阶段（期中）考试英语试题（答案图片版）

武威二中2018-2019-1高三年级第三次阶段性考试英语试卷 命题人： （考试时间：100分钟 试卷满分：120分） 第一部分 阅读理解(共两节，满分40分) 第一节 (共15小题；每小题2分，满分30分) 阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。 A It has long been thought that elephants rely on their large ears and bathing in rivers to stay cool in hot climates. New research, however, has showed that the world's largest land animals have a secret trick of controlling their body temperatures. Scientists have long been puzzled by temperature regulation(调节)in elephants. Generally, animals with large bodies tend to hold more heat because, compared to their size, they have a small surface area for heat to escape from. Elephants, with their heavy­weight frames, would appear to be at a disadvantage in the heat of their African and Asian habitats, especially because they have thick fur to protect them from bushes and trees. Scientists thought that these creatures, which weigh up to 13 tons when fully-grown, grow large ears to help them stay cool. The skin on the ears is thinner, so blood wh