绿色开花植物完成受精作用后,发育成种子和果实的结构分别是
A:受精卵和胚珠
B:胚珠和子房
C:子房和胚珠
D:受精卵和子房
下列说法中不正确的是( )
Jenny's uncle is a scientist. She is proud ________ him.
一 was your weekend?
一It was good.Thank you.
已知f(x)=1+lnxx-1,g(x)=kx(k∈N*),对任意的c>1,存在实数a,b满足0<a<b<c,使得f(c)=f(a)=g(b),则k的最大值为( )