题目

警戒色是某些有毒的或不可食的生物所具有的鲜艳醒目的颜色，这种颜色往往会对捕食者形成信号作用，使其避而远之。某人进行了与警戒色有关的模拟实验：让a、b两组小鸡分别在不同颜色的地板上啄食均为苦味的谷粒，并对啄食情况进行统计，结果如下图所示。据此分析，下列结论成立的是（      ） A、实验初期，小鸡对两种颜色的谷粒啄食比例均等 B、实验初期，鲜艳醒目的谷粒颜色对小鸡是警戒色 C、随实验次数增多，小鸡对醒目颜色的谷 补全对话　填入适当的单词，使对话完整与正确。 A：Hello．5678943． B：Hello．Could I speak to Kate, please? A：Sorry．She isn't here at the(1)________ B：Is that Jim? A：Yes．Who's(2)________? B：This is Mary speaking． A：Hello, Mary．Can I(3)________ a message? B：Yes．Could you ask her to come to my house at five this afternoon? A：All right．It's 3∶30．I(4)________ she'll be back before 4 o'clock．I'll tell her about it as(5)________ as she comes back． B：Thanks a lot．Bye． A：It's a pleasure．Bye．