Marking a tube of toothpaste or paper cup with a patent that is out of date or doesn't exist has been against the law for years.
在牙膏管上或者纸杯上标记不存在或者过期的专利号多年前就是一种违法行为了。
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This paper analyses the validity and reliability of current CET Spoken English Test from its form, information input, marking scheme and proposes a few Suggestions to the potential problems.