A:由合子发育成的生物体细胞中有几个染色体组就叫几倍体
B:由配子发育成的生物体,细胞中无论有几个染色体组也只能叫单倍体
C:单倍体一般高度不孕,多倍体一般茎秆粗壮,果实、种子较大
D:单倍体都是纯种,多倍体等位基因至少有三个
关于领土的说法,正确的是( )
Ann is 1 American worker. She works2a big factory(工厂) in America. It's 3in the morning. Ann 4 up. She is sitting on the bed. She is putting 5her clothes. She 6nothing to do today. Now Ann 7 at the table. She is 8 her breakfast. There is a cup of orange and some bread on the table. Ann is 9 the orange and eating the bread. She is 10today's newspaper.
阅读下面这首诗,完成文后各题
重阳
高适
节物惊心两鬓华,东篱空绕未花开。
百年将半仕三已①,五亩就荒天一涯。
岂有白衣②来剥啄③,一从乌帽④自欹⑤斜。
真诚独坐空搔首,门柳萧萧噪暮鸦。
【注】①已:停止。②白衣:无功名或无官职的士人。③剥啄:形容轻轻敲门的声音。④乌帽:即乌纱帽,帝王贵臣多戴乌纱帽。⑤欹:倾斜。