点拨:①____意为"如此……以至于……"。
He is so young that he can't go to school.
②____为动词短语,意为"坚持做某事"。
He kept on studying until 11: 00 last night.
宋太祖就是( )
过点(1,1)的直线与圆(x-2)2+(y-3)2=9相交于A,B两点,则|AB|的最小值为
如图是课本中克隆技术的阅读材料插图,请据图判断,多利的性状与哪只母羊相似( )