【简答题】阅读理解。 A volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stopped or changed theflights across the Atlantic Ocean, leaving hundreds of passengers stuck in airports.Grirms...

【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。

【简答题】电波的传播方式有_____、非视距和地表波三种

【单选题】岩浆的成分主要是下面哪一项：（）

【单选题】地表结构呈山环水绕、平原居中特点的是[ ]

【单选题】从下图提取的信息可以比较完整地表述为 [ ]

【判断题】安山岩是基性喷出岩

【判断题】斑状和似斑状结构都表明岩浆结晶具有阶段性。()

【简答题】岩浆分结作用（矿床）

【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...