Amy:Who's that ____ (bay boy)?
Chen Jie: He's ____ (me my) brother.
Amy: Is she ____ (you your) mother?
Chen Jie: Yes , ____ (She she ) is.
Amy: Is he ____ (you your) father?
Chen Jie: No, he isn't. ____ (he's He's ) my teacher!
美国共有____ 个州,本土上有____ 个州。与本上不相连的州是____ 州和____ 州。
要测量河两岸相对的两点A、B的距离,先在AB的垂线BF上取两点C、D,使CD=BC,再定出BF的垂线DE,使A、C、E在同一条直线上,如图,可以得到△EDC≌△ABC,所以ED=AB,因此测得ED的长就是AB的长,判定△EDC≌△ABC的理由是( )
血液流经肺部毛细血管时,氧气由肺泡进入血液的原因是( )
下面是四位同学凭想象描写南极地区的语句,你认为正确的是( )