下列这些相互关系中,属于寄生现象的是 ( ) A.一只鸟在树上筑巢 B.蝙蝠给仙 发布时间:2017-04-27 18:10 │ 来源:www.tikuol.com 题型:选择题 问题: 下列这些相互关系中,属于寄生现象的是 ( )A.一只鸟在树上筑巢B.蝙蝠给仙人掌传授花粉C.蚊子吸人血D.血吸虫在人体内生活
题型:选择题 We are sorry to have to announce that the Leeds train that _____ due to arrive at 12: 20 has been delayed by one hour and will now arrive at 13:20.A. was B. is C. will be D. had been 查看答案