海南省定安县2018-2019学年七年级下学期期中考试生物试卷
※题型：单选题※知识点：单选题※试题难度：中等<br>人体的消化系统中,消化和吸收的主要器官是( )<br>A.大肠 B.食道 C.肝 D.小肠<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/e384c35a2a3a485da1eb479e6d437450/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/ce375fa9f96b4936b2718044096d7a0e/2151273C28A78EB73DE5914125B2D20F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>吃饭时大说大笑会呛到,是因为空气和实物进入人体有一共同通道,此通道是( )<br>A.气管 B.喉 C.支气管 D.咽<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/6958b8a92b974b06b46c16388d8bcf0f/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/0e5f28d87b8d49e78c31e4a8d3ddc3c0/2D044C9488DCF9E410E192B0FA350D68.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>鼻腔不具有的功能是( )<br>A.温暖,湿润进入鼻腔的空气 B.气体交换的场所<br>C.清洁进入鼻腔的空气 D.气体进出的通道<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2014/2821c8adb1954a29acf82f3c0e20423f/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2014/a3042003f71e4ef5baab0fd3187e2b28/E594D9095579A46AAC9B44A19D822487.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列血管中,流着动脉血的是( )<br>A.肺静脉 B.肺动脉 C.上腔静脉 D.下腔静脉<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2014/51a60a8ca7cf4d67807b6de75e75d4b2/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2014/777ff6b561c7466eae708ccb311ce15a/B3F48A947289469E81FD68961C5AAF1D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>左、右心室射出的血( )<br>A.都是动脉血<br>B.都是静脉血<br>C.分别是静脉血、动脉血<br>D.分别是动脉血、静脉血<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2012/2679b250d7614e678bfe180d773be157/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2012/d80e68043acf47199763cb26ec0cd779/EA034FC6FE3B0E8C43A308A6BF7F7E4A.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>小明在一次意外事故中失血过多,急需输血,经化验,他的血型为AB型,在正常情况下应该给他输入的血液为( )<br>A.O型 B.AB型 C.B型 D.A型<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/f2cff47d0e1d40f999b6cd4e99b17166/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/8dc483beaa144d73afee34c1005e6a21/8E8529CFD9D3F0B9FD4E595E8ED5A206.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>人体中水、无机盐、尿素的主要排泄途径是( )<br>A.皮肤 B.肺 C.膀胱 D.肾脏<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/4e98e8c75dea43a981e217e2301d5cac/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/343802832fab4b8f97c31af788807f82/015AF66F3BA36A8C4604768D35843AAD.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>人体内食物的消化从_____开始( )<br>A.口腔 B.食道 C.胃 D.小肠<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2014/28186571b5d64f4883bba271b58fa10d/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2014/ab663f6fd14b47779d8ef2362b16b4fc/F5A2571106C12479938EAFDE48A63BBB.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>人体进行呼吸时会呼出大量的二氧化碳,这些二氧化碳产生于( )<br>A.细胞 B.血液<br>C.肺泡 D.气管和支气管<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/77377334561543a0831f349d59a88e76/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e6f677ff85c54cd2b1e08efaea42c897/67744E266447A52BA8675967C097D169.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>肺是人体呼吸系统的主要器官,肺内大约有7亿个肺泡,是进行气体交换的场所。下列肺的结构特点与该功能不相关的是( )<br>A.肺泡的数量很多 B.肺泡壁很薄<br>C.肺泡外包绕毛细血管 D.肺呈半圆锥形<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/0753943ccbba4f91885f85a2e87a0f7b/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/d0dc17760bef40d68909fa8186fe8daa/32F76B3B130909659D05E2F74B425C7D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>血液中的二氧化碳扩散进入肺泡内,需要经过几层细胞( )<br>A.一层 B.二层 C.三层 D.四层<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/577f79aa150947cc80c7c0b5e07d71ee/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/d111190c9d3445c888820855c3170bda/4C941793738E57F03318B79BA2A33EB6.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列行为习惯中,有助于预防心血管疾病的是( )<br>A.多吃高蛋白食品 B.多吃高脂肪食物<br>C.多吃高糖食品 D.多吃新鲜蔬菜和水果<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2015/3af417c2d44b4829b6cc6980885e52b0/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2015/b39ef115996a4fb68d0496ab24799851/B26D9168193764D816C0B58A55114C93.png"><br><br>※题型：多选题※知识点：多选题※试题难度：中等<br>以下几种职业的人群,最容易患呼吸道疾病的是( )<br>A.司机 B.交通警察 C.售货员 D.园林工人<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5f0b4312bd10471bb502a58c8d0ac400/F05F41FFB1AEDF335FC9F5087E5D9329.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/17318044ad2748f2b44fa7efe72529cd/63C91A61EC4C9DEF4703D114C8103B1E.png"><br><br>※题型：读图填空题※知识点：读图填空题※试题难度：中等<br>如图为肺的内部结构模式图,<br>请据图<br>回答:<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/12/19/1C38117F3976A07FEE7FDB15CF159C87.png"><br>1.人体的呼吸系统由和组成。<br>2.肺内有许多和它外面包绕着丰富的。<br>3.的壁很薄,由一层上皮细胞组成,这些特点有利于肺进行。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/d3f5f8974d374b3b92f497316c4d1bac/E2E139774EFADC36EFF7FAD346C49A4E.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9f7a4a42bad74e7e875e82ba5d2278d3/B16E355A1DD0C29B6975C0DECCFC59E3.png"><br><br>※题型：实验题※知识点：实验题※试题难度：中等<br>图为淀粉的消化实验过程,<br>请据图解<br>回答下列问题:<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/12/19/B6B834F9B9E7623AF7596BD39EEB7A53.png"><br>1.图(一)向1和2两试管注入的淀粉糊的量应当;<br>2.图(二)表示向2号试管滴入2毫升唾液,向1号试管滴入;<br>3.图(三)表示将两个试管放在相当于人体体温的℃的温水中保持约10分钟,然后同时取出两个试管;<br>4.图(四)表示分别往冷却后的两个试管里各滴入2滴碘液,这时可以看到:1号试管内;2号试管内。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/9d79d03f32824628bddca0133513be35/BB5D446F59377FC6B07208E8C78585F6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/436eeefc742a4ed093be358a81319b0b/3F7F618A63A4986DEA297AABADDE15FF.png"><br><br>
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