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目前，铅污染已成为威胁我国公民健康的“隐形杀手”，污染源主要是汽车尾气、家装饰品等．为探究铅对人体健康有无影响，科研人员选取30只大小和健康状况相近的小白鼠，并平均分为3组进行实验，实验处理如下表．30天后，获得的实验数据如右图所示．（注：醋酸铅是一种含铅化合物） 注射剂 剂  量 注射方法 检测方法 甲 ？ kg体重 注射10mg 每3天皮下注射一次 每10天检测1次血红蛋白含量 乙 含1.8%醋酸铅的5%葡萄糖溶液 丙 含3.6%醋酸铅的5%葡萄糖溶液 请你回答． （1）若甲和一组对照实验，其变量为注射剂中是否含有醋酸铅，那么，甲组应注射______溶液．你对该实验作出的假设是：______对小白鼠的健康有影响． （2）若此假设与实验结果不符时，你认为正确的做法是______． A．放弃该实验 B．如实记录，重新再做实验 C．马上否定原来的假设 D．修改实验数据，使结论与假设一致 （3）根据右图，得出该实验的结论是： ①由甲和乙曲线可知，铅______（能，不能）影响小白鼠体内血红蛋白含量； ②由丙曲线可知，小白鼠体内铅的含量越高，其体内血红蛋白含量______．
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