前列腺哪叶增大易引起排尿困难（） A.左侧叶 B.右侧叶 C.中叶 D.前叶 E.后 发布时间：2017-06-09 05:18 │ 来源：www.tikuol.com 题型：单项选择题 问题： 前列腺哪叶增大易引起排尿困难（）A.左侧叶B.右侧叶C.中叶D.前叶E.后叶
题型：单项选择题 ___________ You prefer classical music, don’t you? Yes, I do. I find it very relaxing. I often listen to Mozart in the evening after a hard day at work.A．I must admit that I like several pieces of classical music.B．I’d like to give you some advice here.C．You know, I go to a disco almost every week.D．That’s a good idea. 查看答案
题型：单项选择题 在一个种群中随机抽出一定数量的个体，其中基因型为aa的个体占18%，基因型为Aa的个体占78%，基因型为AA的个体占4%。则基因A和基因a的频率分别是[ ]A．82%和18% B．43%和57% C．36%和64% D．92%和8% 查看答案