题型:问答题 简答题 考查小麦种子经灭菌与否跟发生黑穗病的关系,经试验观察,得到数据如下表所示:种子灭菌种子未灭菌合计黑穗病26184210无黑穗病50200250合计76384460试按照原实验目的作统计分析推断. 查看答案
题型:问答题 简答题 Mr. Brown is warm-hearted and often does everything that he can to to those in trouble.A.break outB.set outC.reach outD.pick out 查看答案