题目

连线题（共8分）将下列各种动物与其呼吸方式和所属类群连线。肺呼吸                 家鸽              环节动物    双重呼吸                家兔              昆虫湿润的体表            蝗虫              哺乳动物                                              气管呼吸               蚯蚓              鸟类              We shouldn’t keep silent; we have the freedom of .A. action B. operation C. speech D. attention