A:①被誉为“高原之舟”,主要生活在我国的青藏高原上
B:全球气候变暖,②的生存范围逐渐扩大
C:③被誉为“南极绅士”,分布在严寒的南极大陆沿海一带
D:④被誉为“草原霸主”,主要生活在澳大利亚的热带草原上
Our charity show for three hours this afternoon. We were tired but very happy.
----Mum, Can I have something______? ----Oh, dear . You can only drink some water. There is _____in the kitchen.
设函数y=lg(﹣x2+4x﹣3)的定义域为A,函数y=2x+1,x∈(0,m)的值域为B.
(1)当m=2时,求A∩B;
(2)若“x∈A”是“x∈B”的必要不充分条件,求实数m的取值范围.
珊瑚、珊瑚虫、生石花、病毒、机器人、钟乳石都是生物吗?以下说法正确的是( )