全国各地中考真题:内蒙古呼和浩特市2017年中考生物真题试题(含解析)
内蒙古呼和浩特市2017年中考生物真题试题一、选择题(本题包括15小题,每小题2分,共30分。在每小题给出的四个选项中,只有一项是符合题目要求的)1.瑚瑚虫和血吸虫的共同特征是A.背腹扁平B.身体呈辐射对称C.身体呈两侧对称D.有口无肛门【答案】D【解析】A、腔肠动物的身体呈圆筒形,扁形动物身体背腹扁平。不合题意;BC、腔肠动物身体呈辐射对称,扁形动物呈左右对称(两侧对称)。不合题意;D、腔肠动物有口无肛门,扁形动物也有口无肛门。符合题意。【考点定位】腔肠动物的主要特征及其与人类的关系。【名师点睛】本题主要考查各种动物的主要特征及其与人类的关系。2.下列关于动物形态结构与功能相适应的叙述,错误...
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