Liu Ying is good at singing. She sings ______the famous singer, CoCo.

A．as well as

B．as good as

C．as better as

D．as the best as

表示装配体的性能、规格和特征的尺寸，称为( )。

A．装配尺寸

B．特性尺寸

C．安装尺寸

D．外形尺寸