She dances better than Mary _______.
A:is
B:has
C:does
D:dance
调查某生态系统两个营养级的能量流动关系如下图所示。字母代表能量数值,若能量传递效率是15%,下列关系正确的是( )
Rose received a letter full of love from her parents on her ______ birthday.