题目

机动车用三角警告牌是由支架、回复反射器、荧光器组成，适用于机动车随车携带的、使用时放置在道路上，能昼夜发出警告信号以表示停驶机动车存在的警告装置。关于警告牌的设计与生产，国家发布了《机动车用三角警告牌GB19151-2003》技术标准文件，以下是部分节选内容：3.3回复反射器 由一个或多个回复反射光学单元组成的具有回复反射功能的光学器件。3.6荧光器指一种整体或表面由荧光材料构成，经日光激发能产生短暂光致发光的光学器件。4.Dear Manager,I am Wang Chen,a Senior Two student in the near school. I have read your company's advertisement in a newspaper. He says that you need several parttime mobile salesmans to work on the weekend.As far as I am concerned about,this kind of experience is very meaningful to me. I think the job would be very suitable for me. For one thing,my oral English is fluent and I fond of talking with others. For another,I have some free time,and however,I would like make use of the time. In addition to,not only I love your products,but also have a good,professional knowledge of it. Accordingly,I am real qualified for the job. If the chance is given to me,I will be devoting to the job.I am looking forward to hear from you.Yours sincerely,Wang Chen