In the last few years, we have made great progress________telecommunication.[ ]A. in area ofB. in fi

题目简介

In the last few years, we have made great progress________telecommunication.[ ]A. in area ofB. in fi

题目详情

In the last few years, we have made great progress________telecommunication.
[      ]
A. in area of  
B. in field of
C. in the area of  
D. on the field of
题型:单选题难度:中档来源:同步题

答案

C

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