2021-2022学年人教版生物七年级专项训练之生物体的结构层次（1）练习使用显微镜
※题型：单选题※知识点：单选题※试题难度：较易<br>关于显微镜的使用,下列操作方法恰当的是( )<br>A.下降镜筒时,从侧面注视物镜<br>B.对光时,转动转换器,使高倍物镜对准通光孔<br>C.发现镜头有污点时,使用纱布进行擦拭<br>D.观察时物像偏向右下方,将标本往左上方移动<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/da12b2dfd92b4ac8846f5cd02b2d9ce6/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/bc0d935810bb45a3958fea973acf13fe/56D950B09743D8365BB7D9231B5F3BF9.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>用显微镜观察物像遇到下列情况,其操作过程错误的是( )<br>A.物像不清晰——调节细准焦螺旋<br>B.视野较暗——调节反光镜<br>C.物像偏上方——向下方移动玻片标本<br>D.大幅下降镜筒——眼睛注视物镜<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/991004d86e8f4ec3a1a96ac4431ca6dd/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/d9564187bbe64a8c8b0f40a895af69fd/641092D64371A722FB37500D7995ECE0.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列使用显微镜的操作中,错误的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/21/FBB8BD8A3F2B88F3569B7EDB8169311F.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/21/6371338E56863C60C31E3C8299D22052.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/21/655D1C3CFC6F37128B88D08EE3E4CE4C.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/21/2F52ED6493ACB4502A7127F4F6C8C50D.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/101f112e630e45c7be3a0d209f510f9d/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/fffb34e297964d7193f054e803d1653b/C1E6839ABDFF744541793B0BB92C982D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>一架光学显微镜的镜盒里有甲、乙、丙、丁四个镜头,四个镜头的结构和长度如表所示,请推测用哪些镜头的组合,最有利于看清细胞的结构( )<br><tbody><br>镜头<br>甲<br>乙<br>丙<br>丁<br>螺纹<br>有<br>有<br>无<br>无<br>长度<br>3厘米<br>2厘米<br>5厘米<br>3厘米<br></tbody><br>A.乙和丙 B.甲和丁 C.甲和丙 D.乙和丁<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/5c2e47148c61406da505b99f7f15d2ef/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/b902db4a07cb4af7940a137316835080/3B90BB033097E2179B14FD01BFC03181.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>用显微镜观察时,图中甲图为倍数不同的目镜(10×、5×)与物镜(10×、40×),乙图是放大100倍所看到的图像,欲将乙图视野右下方的细胞移至视野中央,并放大400倍观察,下列操作中错误的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/9FF25B4EC7432BE7E0E51ABD57A02251.png"><br>A.将装片向右下方移动,直至位于视野中央<br>B.将物镜换成甲图中的镜头④<br>C.换成高倍镜之后,应调节细准焦螺旋<br>D.若视野较暗,可以增大光圈<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/5f03598d31b746b4a87523a15188de5e/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/96cdc254da734406a7cee59c7110bd29/EC0803B437BB5FC76293CF1503B44300.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>某同学在显微镜下观察写有字母“A”的玻片,看到的物像不在视野的正中央,于是他将玻片向右下方轻轻移动,使物像移到了视野的正中央,那么他之前看到的物像是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/7F14D1F8A2F52114DE1272D1BFEBC14A.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/6AF086B32584446191C8071266F803DC.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/E756DFFB959DD2648C536A605986C94F.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/19/0B68BC9E731AB9D6AC39797943D7F4E5.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/02112a4703a3469ab9b2805449371c16/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/1d580b432ef4434fb4a4a27d553d1758/4848FB2B79FEE3138D9B97A7F34428CC.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图是一台显微镜的四个镜头,若要在视野中看到细胞数目最多的目镜和物镜的组合是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/11/9/B987D37F5534A8C6ECFED1BD7791818D.png"><br>A.①和② B.③和② C.③和① D.①和④<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/4367eaa7502543ecb415c0247938df51/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/34e05c8daf404db8ae3c459e53ecb352/0982B88295EA084CA21D13E9871F5A2E.png"><br><br>
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