| センター試験2001年 1 2A 2B 2C 4問題文 4設問 5問題文 5設問 6問題文 6設問 解答 |
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| Fainting, the condition of a brief
loss of consciousness, occurs
from lack of oxygen (O2) in the brain. Tension on blood vessels
can lead to this condition. For example,
a quick turn of the head can reduce blood
flow to the brain, which naturally reduces
the oxygen in the brain. |
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