2020-2021学年八年级生物上册人教版同步课时作业5.1.3软体动物和节肢动物
※题型：单选题※知识点：单选题※试题难度：中等<br>将河蚌放到50℃左右的温水中,待贝壳张开以后,会看到一层透明的薄膜,这层薄膜是( )<br>A.贝壳 B.珍珠层 C.外套膜 D.细胞膜<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/dcfe9d6290844fa6ad065a184846fd4f/D7C9A679F3C72D4F1064B7D0A0FD4AD8.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：中等<br>青岛的海鲜种类繁多,下列哪一组海鲜属于软体动物( )<br>A.带鱼、牡蛎 B.海蜇、鲍鱼<br>C.对虾、梭子蟹 D.乌贼、扇贝<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/3008b3ffe3b740179fcee6f3aed8a8a4/D9A7E0722DAB5479A60928D5B8864BC6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/e1e8a0b603e948d29d7fbb36ecebd346/F4D7DAF69805570CE7D118B28B85F719.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>据报道,南京一市民买了2.5千克河蚌,在其中一只河蚌内剖出了12颗大小不同的珍珠,让大家啧啧称奇(如图)。根据所学知识,你认为珍珠是由河蚌的哪一结构形成的( )<img src="https://picture2.zhihuicn.com/testImage/2/2019/10/21/F0BB5C32271597A9BA609B7F908D6C7B.png"><br>A.贝壳 B.珍珠质 C.外套膜 D.珍珠层<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/2cbbcc0bb6ca4e4cb1d9ba66c9b7e40d/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/081b857077e54d669b376d2ae39b17bc/5002F94BFD8CBC54CBDE0DAB38CFAD63.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>节肢动物的主要特征是( )。A.身体由许多形态相似的体节组成,属于无脊椎动物<br>B.身体柔软,体外或体内有贝壳保护<br>C.身体呈线形或长圆形,体表有角质层<br>D.身体分节,体表有坚硬的外骨骼和分节的附肢,头部有眼、触角和口等<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/3e35f691ebe747049f5514078901c3b1/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>昆虫是有三对足、一般有两对翅的节肢动物。如图图示的动物中,属于昆虫的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/27/5FC81869CD676DCD43DCEFE9F54BD6F3.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/27/A495B7209C25A72D7CE4C7176A428454.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/27/BA9C4AFC56CD45A9E29AB74E11C99967.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2019/6/27/D65551A4079530FEAF60C0C51784D80B.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/a6d51449c7c14867819d19d4cffb9458/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/efc3a6398974457486b4b9753799624b/CCE2BB39786EE67B757BEDFDAC104892.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>请观察<br>蝗虫的外部形态图,回答问题。<br>(<br>注意<br>:[<br>]<br>内填数字,横线上填名称<br>)<br><img src="https://picture2.zhihuicn.com/testImage/2/2019/9/9/58CBFD5E80208109658BCDAF9270FDA4.png"><br>1.蝗虫的运动器官生长在身体的部,图中[]是它的飞行器官。<br>2.蝗虫的体表有坚韧的,它的作用是。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/3011f14c9d1c48ff88389d6c589436e6/7319CEF819B37D7B7E864C44B1B75202.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/992276b4abf4405790230b873201e203/4C51D6041AD8409FB76C4527E2D8D27D.png"><br><br>
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