全国各地中考真题:山东省德州市2017年中考生物真题试题(含解析)
山东省德州市2017年中考生物试题一、选择题(下列各题的四个选项中,只有一项是最符合题意的。每小题1分,共20分)1.如图,在观察叶片的表皮细胞装片时,物像由图一转换到图二,不需要的操作是A.转动转换器B.调节反光镜C.转动粗准焦螺旋D.转动细准焦螺旋【答案】C【考点定位】显微镜的使用【名师点睛】本题主要考查显微镜的使用的相关知识,要求学生熟练操作显微镜。2.胎儿在母体子宫内发育的过程中,不能进行下列哪项生理活动?A.气体交换B.排泄废物C.消化食物D.血液循环【答案】C【解析】胎儿在母体子宫内发育时,所需要的营养物质通过脐带和胎盘从母体获得,从母体血液中获取,不需要消化食物,故C错误,产生的...
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