暑假抢先知（2）——2020-2021学年上学期八年级生物人教版
※题型：单选题※知识点：单选题※试题难度：中等<br>下列动物中,哪个是线虫动物( )<br>A.绦虫 B.蚯蚓 C.钩虫 D.血吸虫<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/9c2e76fb60054e81a5994a0491e42f79/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/ddb4f22c40c240b18081b7fb8a49b1c0/C43A6FA9B017A737DF8DA7E73EB0187E.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>蛔虫和血吸虫都是寄生生活的无脊椎动物,它们的共同特点是( )<br>A.生殖器官发达 B.消化器官发达<br>C.运动器官发达 D.感觉器官发达<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/43f5ea5408f14eb69a514c23f66009fa/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/4335a43b4d3446d68595ab09f27641c7/488CB0D993305CDFD876605EF5E2ABDF.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列哪种动物的身体呈圆筒形,由许多形状相似的体节组成,靠刚毛辅助运动( )<br>A.蚯蚓 B.蜗牛 C.水螅 D.蝗虫<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/4b36431cb0cc4b30bba2a6ccdb52fab9/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/748bc5a48c6a46a88401e09f6ec00dda/535D48403AA20E3A1DF0223F50A59C25.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列关于蚯蚓与人类生活关系的叙述,错误的是( )<br>A.疏松土壤、改善土壤结构<br>B.取食植物根系,对植物生长不利<br>C.排出的粪便可以增加土壤肥力<br>D.可以加工成富含蛋白质的食品<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/a85a58a7fe6949e79010662d836a07a2/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/b020720efb8c4e2db0f698122898078a/B1A7CDBB5CF9AAD6650D57E88E1A96CE.png"><br><br>
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