AIDS control and prevention isato China as well as the whole world.[ ]A. surprise B. challenge C. re

题目简介

AIDS control and prevention isato China as well as the whole world.[ ]A. surprise B. challenge C. re

题目详情

AIDS control and prevention is  a          to China as well as the whole world.   
[     ]
A. surprise  
B. challenge  
C. reaction  
D. threat
题型:单选题难度:中档来源:同步题

答案

B

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