“在那个距今二百多年全的时代里，殖民地联合起来挑战宗主国是破天荒的大事，……与大英帝国的战争一直艰苦地打了八年，最终赢得了对立。”——摘自《大国崛起》解说词。这段话反映的重大历史事件是（  ）

①日常生活中食用的豆油主要来自大豆种子的胚乳   

②大豆播种前翻耕土壤的目的是满足种子萌发对空气的需要   

③大豆的果实由子房壁发育成的果皮和胚珠发育成的种子组成 

④大豆根吸收的水和无机盐由筛管运输到其他部位   

⑤大豆种子的胚是由受精卵发育而成  

⑥适宜条件下大豆种子的胚发育成茎和叶，胚根发育成根

完形填空。
Dear friend,
     I am 1 American school girl. My name is Alice Green. I am twelve. I 2 two brothers. My brothers and I 3 all at school. We go to school 4 Monday 5 Friday. We 6 have classes on 7and Sunday. We don't go to school on weekends. My father and my mother are teachers. They say China is great. I like 8, and I can sing a lot of songs. My brother and I like baseball and basketball. 9do you like? Let's10friends. Please write soon.
Yours,
Alice Green

如图，直线y₁=k₁x+a与y₂=k₂x+b的交点坐标为（1，2），则使y₁≥y₂的x的取值范围为（　　）

       time is it?