写作题目:行百里者半九十
要求:A.必须写成议论文。B.不少于800字。C.字迹工整,卷面整洁。
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Why did the writer have some understanding of the chemical industry?
He has worked as ______ for a chemical company.
For this part,you should write a composition on the topic On Information Security (信息安全问题). You should write at least 200 words.