答案：A
题干意思：这个语言学家发现在西伯利亚中部使用的一种几乎绝迹的语言和美洲原住民使用的多种语言之间有着惊人的相似之处.答案解析]
A.extinctadi. no longer in existence不再存在的;绝种的 Herbalism had become an all but extinct skill in the Western world.草药医术在西方世界几乎已成了一项绝迹的技术。
B.ethnic adi. connected with or belonging to a nation race or people that shares a cultural tradition 民族的;
They have redrawn the country's boundaries along ethniclines.他们以种族为界重新勾画了该国的国界。
C. exotic adj. from or in another country,奇异的;异国情调的;异国风味的
I was beguiled by the romance and exotic atmosphere of the souksin Marrakech我被马拉喀什剧场浪漫的异国情调迷住了。
D erratic adj. not happening at regular times; not following any plan or regular pattern; that you cannot rely on SYN unpredictable不规则的;不确定的;不稳定的;不可靠的
Businessmen are displeased with erratic economic Dolicymaking.商人们对经济政策的飘忽不定感到气愤
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