— I hear Susan eats little or for supper.
— It's really bad for her health. Why not exercise more to lose weight?
A:nothing
B:something
C:anything
D:Everything
在北宋以前,最先进的印刷术是( )
对于函数y=f(x),如果存在区间m,n,同时满足下列条件:①f(x)在m,n内是单调的;②当定义域是m,n时,f(x)的值域也是m,n,则称m,n是该函数的“梦想区间”.若函数f(x)=a+1a-1x(a>0)存在“梦想区间”,则a的取值范围是( )
下列动物在由受精卵发育成新个体的过程中,不经过变态发育过程中的是( )
读图,回答下题。