题目

More students than ever before are taking a gap year(间隔年) before going to university. It used to be the “year off” between school and university. The gap-year phenomenon originated(起源) with the months left over to Oxbridge applicants between entrance exams in November and the start of the next academic year. This year, 25,310 students who have accepted places in higher education institutions have put off their entry until next year, according to statistics on university entrance provided by the University and College Admissions Service (UCAS). That is a record 14.7% incre在生态系统中，    是生产者，能通过    制造有机物，    是消费者，它们直接或间接的以    为食，    是分解者，这三者构成了生态系统的生物部分．