--- What do you think about _______dress in the shop window?

--- Oh, it's beautiful. Amy will be pleased if she can have it as _______birthday present.

A．a, a

B．the, a

C．a, the

D．the, the

下列关于结扎的叙述中，不正确的是[ ]

A．是常用的节育方式之一  

B．可以结扎输卵管，也可以结扎输精管  

C．能够阻止生殖细胞的结合  

D．很可能会影响人的生殖系统的正常功能