----I heard you bought a new house last week.

----Yes,it is ________ my old one .

A．twice big than

B．the twice size as

C．twice as big as

D．two times of

下列哪种辅酶不是由维生素衍生的（）。

A.CoA^-SH

B.NAD⁺

C.CoQ

D.Tpp

E.pLp