皮皮学，免费搜题
登录
搜题
【单选题】
白色南瓜和黄色球状南瓜杂交，两对相对性状自由组合，F 1 全为白色南瓜。若F 2 中纯合白色球状南瓜有1000个，从理论上算，F 2 中杂合白色南瓜的数目是： [ ]A.
1000
B.
2000
C.
4000
D.
8000
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】When I was 17, I read a quote that went something like: “If you live each day as if it were your last, someday you’ ll most certainly be right.” It made an impression on me, and since then, for the pa...
【简答题】When I was 17，I read a quote that went something like：“If you live each day as if it were your last，someday you’ll most certainly be right” It made a deep 1 on me, and since then, for the past 33 year...
【简答题】北京街头新景——药店里开健身房 “药店里开健身房了。”这个消息一经传出,便以飞快的速度传播开了。记者循着消息找到了位于北京洋桥的北京普生大药房,此时正是晚上7点多,灯火通明的二层建筑,楼下是药房,楼上是健身房,健身者正在健身。店员说,每天晚上都是如此,人多的时候想健身还要等候。恰巧碰到一位中年妇女在询问来健身的有关事宜。经了解,该大药房在三家连锁店开设了健身房,凡是该药店的会员,就可以免费使用健身...
相关题目：