人类白化病是由隐性基因(a)控制的一种遗传病,分析下面的白化病遗传图解,11号个体可能的基因组成是( )
A:aa
B:AA
C:Aa或aa
D:AA或Aa
①我国面临严峻的环境形势,大气污染严重 ②今后我国应把治理雾霾作为中心工作
③雾霾作为一种生态环境问题是可以治理的 ④我国应坚持科学发展观,走可持续发展道路
函数f(x)=x3﹣3x+1在闭区间﹣3,0上的最大值、最小值分别是( )
硝烟散尽,回望历史,抗战精神将化为永恒,它激励着我们为实现中华民族伟大复兴而努力奋斗!下列与抗日战争胜利的历史意义无关的是( )
It is Saturday morning. My father is ____ the car. I am ____ him. My mother is ____ ____ in the kitchen. Helen is ____ the living room. She is ____ the floor. Where is Tim? What is he doing now? Tim is in his ____ .He is ____. Ben's dog is sleeping too.