106. The method highly effective.A. was provedB. proved asC. proved to beD. is proved to

问题补充：

106. The method highly effective.

A. was proved

B. proved as

C. proved to be

D. is proved to be

答案：

A. was proved

B. proved as

C. proved to be

D. is proved to be

解析：可联系答.案.网客服索取。