下列哪项与急性盆腔炎不相关（）
A.宫腔内手术操作感染
B.卵巢囊肿扭转
C.产后或流产后感染
D.经期卫生不良
E.性传播疾病
参考答案：B
— Today the forests are getting fewer and fewer,
— We must ____ down too many trees
A．keep people from cutting
B．prevent people from cutting
C．stop people from cutting
D．all the above
—How many students are there in the classroom?
— ．They are all in the lab．
A．Some
B．None
C．A11
D．Neither
