应该选择哪个?It is well known that knowledge is the __ condition for expansion of mind.
问题描述：
应该选择哪个?It is well known that knowledge is the __ condition for expansion of mind.
A. incompatible B. incredible C. indefinite
D. indispensable
答案不一样,到底哪个对啊??
答
众所周知,知识是开放性思维必不可少的条件
选D