现行英语阅读教材容量大,题材广,为学生提供了大量具有各种背景知识的题材。在英语阅读的过程中,学生会碰到许多由于背景知识缺乏或由于中西方文化差异而产生的理解障碍。它影响着学生阅读的速度和理解的效果。因此,背景知识在阅读理解中起着重要的作用。Nunan(1991)曾引 The current English reading materials have a large capacity and a wide range of subjects, providing students with a large number of themes with various background knowledge. In the process of reading English, students encounter many obstacles to understanding due to lack of background knowledge or cultural differences between China and the West. It affects the speed of reading and the effect of understanding. Therefore, background knowledge plays an important role in reading comprehension. Nunan (1991) cited