全国各地中考真题:河北省保定市2018年初中毕业生升学文化课考试生物试卷(原卷版)
【淘宝搜索店铺:中小学教辅资源店微信:mlxt2022】河北省保定市2018年初中毕业生升学文化课考试生物试卷第Ⅰ卷单项选择题1.为探究酸雨是否影响种子的萌发,科研人员用小麦种子进行了模拟实验,除表中变量外其余环境条件均相同且适宜,发芽率统计结果见下表。下列说法正确的是组别处理发芽率甲加入模拟酸雨30%乙加入等量清水90%A.本实验的变量是清水的多少B.多做几组重复实验可以消除误差C.只要不受酸雨影响,种子就可以萌发D.实验证明酸雨不利于小麦种子的萌发2.细胞是生物体结构和功能的基本单位,下列有关细胞的叙述错误的是A.所有植物细胞都有叶绿体B.染色体存在于细胞核中C.草履虫能独立完成生命活动D...
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