题目

李紫薇同学将六种生物依某一标准进行分类，结果如表，她采用的分类依据是( ) 类群Ⅰ苍蝇 蚯蚓 蜘蛛 类群Ⅱ扬子鳄大熊猫娃娃鱼 A.受精方式的不同                B.体温是否恒定 C.生殖方式的不同                D.脊椎骨的有无 答案：D。苍蝇、蜘蛛是节肢动物，蚯蚓是环节动物，体内都没有由脊椎骨构成的脊柱，属于无脊椎动物。扬子鳄是爬行动物，娃娃鱼是两栖动物，大熊猫是哺乳动物，体内都有由脊椎骨构成的脊柱，属于脊椎动物。根据下面的对话内容，从对话前方框中的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。（共5小题；每小题1分，分）A．Where is the farm?C．It’s Sunday Tomorrow．E．Why not make it a little earlier?B．How far is it?D．What do you think?F．What about seven thirty?(It’s Saturday． Lin Tao and Jim are talking about what they are going to do Tomorrow．)A：Hi，Jim！小题1:_______ What are you going to do?B：I’ve no idea. 小题2:________A：I’m going to work on my uncle’s farm. Would you like to come with me?B：I’d love to very much. 小题3:______A：About 15 kilometres. We can go there by bus.B：When are we going to leave?A：小题4:_______ It will take us about half an hour to get there. B：小题5:_____ Then we can work there longer.A：OK. Let’s make it six thirty then.B：Great! Where shall we meet?A：Let’s meet at the bus stop.B：All right. See you then.A：See you tomorrow.