—Lucy.She sings ________ her sister.
A:as beautiful as
B:more beautiful than
C:more beautifully than
D:the most beautifully
关于现代生物进化理论的叙述,错误的是( )
“橘生淮南则为橘,橘生淮北则为枳”,造成这种现象的地理界线是( )