托福听力原文听写:玉米
托福听力Questions 47-50 Listen to part of a lecture from the American civilization course.In the late 1400s, when Christopher Columbus returned to Spain from the western hemisphere, he brought wi
SSS科学60秒:20120104
托福考试听力训练Ever wondered why mosquitoes eat some people up but leave others relatively unscathed? A new study finds that this preferential treatment is due to the smells produced by the micr...
托福听力:非洲小草鼠
托福听力 很难慎入Human populations near the equator have evolved dark skin over many generations because of exposure to the fiercest rays of the sun. A similar phenomenon has also occurred in oth...
托福听力:玉米
托福听力Questions 47-50 Listen to part of a lecture from the American civilization course. In the late 1400s, when Christopher Columbus returned to Spain from the western hemisphere, he brought ...