问题描述：
英语冠词应用：advertising advertisement
A company plans to do an advertising which will do advertisement 10 times.
advertising 是不可数名词,前面为什么要加an呢?
A company plans to do an advertising which will do advertisement 10 times.
advertising 是不可数名词,前面为什么要加an呢?
问题解答：
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