The sentence “Look at the pretty little girl’s dresses” is _______, because it is not clear whether the girl or the dresses are “pretty”.

A．adequate

B．transparent

C．explicit

D．ambiguous

在立位透视时，节育环正常位置通常在（）

A.与耻骨联合重叠

B.耻骨联合上2～5cm

C.耻骨联合上5～8cm

D.耻骨联合上8cm以上

E.耻骨联合下2～5cm