第22题: [单项选择]"Greenhouse effect" means ______. A. the way in which gases are used for keeping plants warm B. a natural course which is to some degree helpful to us C. the way" greenhouse gases trap heat on the earth D. the whole course in which greenhouse gases prevent heat 参考答案:B
第28题: [单项选择]旅游者在办理退票手续时,以下哪种做法不正确() A. 该旅游者因路遇堵车误机,要求退票则免收手续费 B. 旅游者要求退票,票务人员应认真查验乘机人的有效证件,核对机票上的乘机人姓名、航班、日期及票号 C. 旅游者要求在飞机离站前24小时之前退票,应收取票价5%的退票手续费 D. 旅游者要求在飞机离站后退票,应收取票价50%的退票手续费 参考答案:A
A. attacked the humans B. ate the sugar crop C. became problems themselves D. had nothing to eat 参考答案:C 答案解析:[分析] 本题题干问:mongooses in Jamaica吃光了老鼠后,会怎样呢 答案显然在第四段。原文说:the mongooses ate lambs,kids,puppies,and wil