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【单选题】
氟化硅晶体熔点远低于氟化铝熔点的原因是
A.
氟化硅电价高晶格能大
B.
氟化铝晶格能大
C.
氟化铝是离子晶体而氟化硅是分子晶体
D.
氟化硅晶体结构密实
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Human beings have used tools for a very long time. In some parts of the world you can still find tools that people used more than two million years ago. They made these tools by hitting one stone agai...
A.
disastrous.
B.
unpredictable.
C.
exciting.
D.
colourful.
【单选题】Human beings have used tools for a very long time. In some parts of the world you can still find tools that people used more than two million years ago. They made these tools by hitting one stone agai...
A.
disastrous.
B.
unpredictable.
C.
exciting.
D.
colourful.
【单选题】Human beings have used tools for a very long time. In some parts of the world you can still find tools that people used more than two million years ago. They made these tools by hitting one stone agai...
A.
was one of the first tools.
B.
developed human capabilities.
C.
led to the invention of machines.
D.
was crucial to the development of mankind.