Her idea seems very_____ , so we don't understancl it.[ ]

A. conventional

B. abstract

C. evident

D. superb

下列能够促进胆固醇代谢的水溶性维生素是

A．维生素B₁

B．维生素B₂

C．维生素C

D．维生素B₁₂

E．叶酸