2020-2021学年人教版八年级上册生物课堂小测5.1.7 哺乳动物
※题型：单选题※知识点：单选题※试题难度：较易<br>下列与狼的肉食习性有关的特征是( )<br>A.体表被毛 B.胎生、哺乳 C.犬齿发达 D.体温恒定<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2014/5d270ea0397c4afaa67e7c1ef90285d7/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2014/9cf89416d42949f4b3a6a6686c558e91/6B309EED589C9C5F1102FD7DD9CB55AD.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>家兔与食草生活相适应的特点是( )<br>A.体表被毛 B.胎生,哺乳<br>C.牙齿分化为门齿和臼齿 D.有发达的犬齿<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/6265dd545c4f4ba0a71f1b89756a98ff/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e5d1fd00fca5401080ff4e42d712f29a/A77876013FA81586AD0100008044C372.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>树懒行动缓慢,皮肤上长有毛发,胎生,用肺呼吸。动物学家根据这些特点把树懒归类为( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/7/15/BF20BD810C66EAEA62506561126ACAA0.png"><br>A.两栖类 B.爬行类 C.鸟类 D.哺乳类<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/dfbffd64c32847eb979621f4d3f1f979/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/4b656110a71f48618a80fa60b7ba3f52/04D1AC875038FDBF510FE378428C7247.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>哺乳动物体表一般被毛,其主要作用是( )<br>A.保护 B.伪装 C.防御 D.保温<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/4ee969229a974302bcbaaa4f19e2c1d8/D9A7E0722DAB5479A60928D5B8864BC6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/58bc65ad1d424e9180ae3f928c39efeb/3A50A5DA6066027BA276EBDB48CD8414.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>图中④属于( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/5/14/FBAB20064A111CB627CAC1CFB3A14DE2.png"><br>A.两栖类 B.爬行类 C.鸟类 D.哺乳类<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5644f1ef5056472db3520e9d5af602bd/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/6274988fb6ae4e949f03d17c168b5904/77E452407B86F3109F4EEDF915E51466.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列关于哺乳动物的说法,错误的是( )<br>A.主要特征包括胎生和哺乳等<br>B.是动物界最高等的类群<br>C.有些可以生活在水中<br>D.哺乳动物适应环境的能力很强,能适应任何环境<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/c7fe512495c644d7aba7be6df23fff59/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e5b7632c090242b982778460f2844592/C68C71DEC3EEA8FE27C9210BE78311F1.png"><br><br>
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