下列不是宫内节育器嵌顿原因的选项是()
A.放置IUD时损伤子宫壁
B.选用的IUD过大
C.IUD有棱角易损伤子宫壁
D.宫腔深度5cm
E.子宫内膜处于增生期
参考答案:E
按照被访者发表意见的形式不同,集体访谈可分为两大类:一类是各抒己见式的访谈,以头脑风暴法为代表;一类是讨论式的访谈,其代表是()。
As oil pipe line connections were broken,()quantity of oil was caused to spill onto the wharf and into the dock water.
A.a not knowing
B.an unknowing
C.an unknown
D.a not known