题目

人类影响水循环的下列活动中，会给人类生产和生活带来不利后果的是A．过量开采地下水                     B．植树造林      C．一些地区修建水库和跨流域调水       D．大面积排干湖泊沼泽 答案：AD______of the students in our class______ able to play computer games well.A. Two-fifths; are B. Two fifth; isC. Second fifths; are D. Two five; are