[A]. the origin of continents.
[B]. the relationship between astral phenomena and the moon.
[C]. differences of opinion among authoritative geologists.
[D]. the relationship between asteroids and meteorites.
4.Sialic material refers to
[A]. the broken rock resulting from the impact of a meteorite against the earth.
[B]. material that exists on planets other than the earth.
[C]. a composite of rock typical of continental areas of the earth.
[D]. material that is man-made to simulate materials that existed far back in geological history.
Vocabulary
meteorit 陨石,陨星 asteroid (火星和木星轨道间)小行星 obliterate 除去,消减痕迹 crater 火山口,陨石坑 mare 海,(也指月亮,火星上的)阴暗区
6. impact 撞击
7. impact crater 陨石坑,撞击火山
8. brecciate 合成角砾岩
the zone of brecciation 角砾岩地带
9. mantle 地幔
10. stress 应力
local stress 局部(本身)应力
11. sialic 硅铝的
12. probability 概率,可能性
13. disseminate 传播,分散,浸染
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