弱问蓝皮书题一道

The proposed urban development zones do not represent a new principle; it was employed in "Operation Bootstrap" in Puerto Rico.

A

B represent not a new principle,but one that

C are not a new principle; the same one

D are not a new principle,but one that

E are not new in principle;it

答案是B  有点不明白题意 谢谢了！嘿嘿

提议的城区扩建计划不是一个新的观念，而是已经在Puerto Rico的Operation Bootstrap里采用过了

（not...but...的平行）