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【多选题】
大洋裂谷岩浆直接来自上地幔,主要为()岩浆
A.
基性岩浆
B.
超基性岩浆
C.
中性岩浆
D.
酸性岩浆
题目标签:
岩浆
上地幔
裂谷
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【单选题】Earthquakes An earthquake is one of the most terrifying phenomena that nature can dish up. We generally think of the ground we stand on as "rock-solid" and completely stable. An earthquake can shatter...
A.
More than 3 million.
B.
1.5 million.
C.
About 8,000.
D.
11.
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【填空题】岩浆的分异作用可分为熔离分异、结晶分异、()三种形式。
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【单选题】大洋板块俯冲到大陆板块之下,这里往往形成( ) ① 海沟 ②褶皱山脉 ③裂谷 ④岛孤和海岸山脉
A.
①③
B.
②④
C.
③④
D.
①
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【单选题】岩浆的成分主要是下面哪一项:()
A.
磷酸盐熔浆
B.
盐酸熔浆
C.
硅酸盐熔浆
D.
硫酸盐熔浆
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【判断题】斑状和似斑状结构都表明岩浆结晶具有阶段性。()
A.
正确
B.
错误
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【简答题】岩浆分结作用(矿床)
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【简答题】阅读理解 A volcanic eruption(喷发) in Iceland has sent ash across northern Europe. Airlines have stopped or changed the flights across the Atlantic Ocean, leaving hundreds of passengers stuck in the airport...
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【简答题】断裂谷
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【简答题】地壳和上地幔顶部(________以上),由坚硬的岩石组成,合称为________。
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