Physics
Why does bleeding occur through the nose in high mountainous regions ?

The blood pressure fluctuates and finally decreases drastically
The pressure of blood in capillaries is greater than the outside pressure
The blood pressure of a person increases at high altitudes
The pressure at high altitudes is greater than that on the plains

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Physics
The nature of fuse wire is

Low resistance and low melting point.
High resistance and low melting point.
High resistance and high melting point.
Low resistance and high melting point.

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