A:豌豆是自花受粉,在实验过程中免去了人工授粉的麻烦
B:解释实验现象时,提出的假说之一是:F1产生配子时,成对的遗传因子彼此分离
C:根据假说进行的演绎是:若假说成立,则测交后代出现比例接近的两种表现型
D:对实验数据的分析采用统计学的方法,找出遗传的规律性
浊液区别于其他分散系最本质的特征是( )
解决水资源地区分布不均的主要措施是( )
短文改错。
Holidays are fun but they also give thieves a lot of chances steal____ things.Follow my advice, and you will safe____ during holidays. Even though you might be busy shop____, always notice what is going on around you____. You never know when someone might be trying to steal something from you pockets. Don't forget____ your bag in your car. It's also important to take care of your homes during the holidays.
上海世博会的召开,引来了世人的充分关注,大家纷纷前往参观,据统计10月16日参观人数达到了130万人,若用科学记数法表示当日的参观人数为( )