G-6-PD缺乏者出现溶血的原因是缺乏（）
A.FMN
B.NAD+
C.FAD
D.NADPH
E.NADP+
参考答案：D
—My difficulty in learning English is how to get the pronunciation right.
—_______.[ ]
A. You'd better follow the tape often.
B. Try to remember new words.
C. Why not do more writing?
抵免法
