As is known to all，________life in ________ modern world is easier in some ways than ________ life our grandparents lived.

A．the；a；the

B．a；the；the

C．/；the；the

D．the；/；the

关于产瘤的描述正确的有（）

A.多有血循环受阻所致皮下水肿

B.多位于头先露部皮下组织

C.不超过骨缝界限

D.一般于生后2～4天消失

E.压之凹陷，为凹陷性水肿，无波动感