我国经济特区和香港、澳门特别行政区的最大区别在于:( )
A:社会制度不同
B:外交政策不同
C:主权归属不同
D:经济政策不同
Clerk: ____ I help you?
Mary: Yes, please. I want a sweater.
Clerk: What ____ do you want?
Mary: Blue.
Clerk: Here you are.
Mary: How ____ is it?
Clerk: Nine dollars.
Mary: I'll ____ it. Thanks.
Clerk: You're ____.
—________.
已知1x﹣1y=1x+y,则yx﹣xy﹣2=____
我们要建立和发展真正的友谊,就应该做到( )①多欣赏和赞美朋友 ②无论付出什么代价,都要维持友谊③在朋友有困难时,要施以援手 ④当朋友犯错误时,要明确指出,并帮助其改正