A:Competing
B:Having completed
C:To have completed
D:To complete
依据卢瑟福的原子行星模型理论,在原子中绕核高速旋转的是( )
—For one week.But it mustn't ________ to others.
下列是几种常见的动物,有关它们特征的说法错误的是( )