问题描述：
She has flu.为何不用加a
she has a headache.she has a temperature.为何要加a
she has flu.she has measles.she has mumps.为何不用加a
那么为什么 headache 和 temperature 要加a 难道他们是可数的?
she has a headache.she has a temperature.为何要加a
she has flu.she has measles.she has mumps.为何不用加a
那么为什么 headache 和 temperature 要加a 难道他们是可数的?
问题解答：
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