A) the two continents are still moving in opposite directions
B) they have been found to share certain geological features
C) the African plate has been stable for 30 million years
D) over 100 hot spots are scattered all around the globe
4.The hot spot theory may prove useful in explaining__________.
A) the structure of the African plates. B) the revival of dead volcanoes.
C) the mobility of the continents. D) the formation of new oceans.
5.The passage is mainly about______________.
A) the features of volcanic activities
B) the importance of the theory about drifting plates
C) the significance of hot spots in geophysical studies
D) the process of the formation of volcanoes
选项翻译与答案详解
1.从文章第一段我们可以知道,_____________。
A)在热点没有火山活动 B)大多数的热点位于板块内部
C)热点通常位于漂移板块的边界处 D)板块经过热点后会留下死火山
根据题干直接查找到第1段。第2句第2个分句提到 其中很多位于板块内部的深处 ,而表达同样含义的是B选项。该段第1句指出,这些互不相连、发生火山运动的小地区,地质学家称之为热点,可见A项错误。选项C与第2句第1个分句的内容相反。倒数第2句提到 在某些情形下,板块移动经过热点留下死火山的痕迹 ,即不是所有板块移动都会留下死火山的痕迹,故D错。
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