()辅酶的功能基团是异咯嗪环。
A.FMN
B.FAD
C.两者均有
D.两者均无
参考答案:C
____ ugly, these chocolate cookies don’t sell well even though they taste good.
A.Looked
B.Looking
C.Being looked
D.To look
碘是合成甲状腺激素的原料,为什么有时又用碘剂治疗甲状腺功能亢进症?