A team of American scientists has found a treatment to protect humans from the deadly H5N1 flu virus, brings great to the world.
A. that; appearance
B. which; relief
C. which; advantage
D. that; profit
网友回答
A. that; appearance
(答案→)B. which; relief
C. which; advantage
D. that; profit
解析： 第一空考查非限制性定语从句，which 做主语，指前半句话的含义，第二空根据句意是把很大的安慰带给世界。relief解脱，放松，appearance出现，advantage有利条件，profit 利润，所以选B。