Earth observations should provide "value added" applications from existing environmental services, property title holders and process driven financial firms, while creating greater liquidity within the corporations that use them.

A．as

B．to

C．for

D．with

保尔把冬妮娅当作一个知心朋友，把他那极大的秘密统统告诉了她，这个秘密是（）

A.他在神父的面团里撒烟末

B.他怎样偷中尉的手枪

C.他为什么和苏哈里科打架

D.他为什么离开了车站食堂