美国大学的学年分为两个或3个学期, 前者每学期15周,后者每学期10周。美国大学学生上课的时间通常是9月份到5 月份。他们也可在夏季学习。学生在每学期开始的几周前选择课程。各大学为学生的主修科目和辅修科目开设许多课程,大学生必须都学。这些课程包括科学、数学、计算机、历史和英语。还有些课程仅为了娱乐,如舞蹈、戏剧或体育。考试通常在期中或期 The academic year for American universities is divided into two or three semesters, the former 15 weeks per semester, and the latter 10 weeks per semester. American university students usually go to school from September to May. They can also study in summer. Students choose courses weeks before the beginning of each semester. Universities offer many courses for students majoring in subjects and minor subjects, and college students must learn. These courses include science, mathematics, computers, history and English. Still other classes are for entertainment, such as dancing, theater or sports. The exam is usually in the mid-term or in the period