请求正确（最好是标准）翻译以下句子

Learn to treat customers courteously and other related commercial etiquette.

100 surveys are completed, among which 6 copies are from foreign car lovers.

survey on commercial streets of Lianhua Road, Zhuhai city.

Certificate of National Computer Rank Examination （NCRE），Level2

学会了礼貌待客和相关商务礼仪
完成问卷100份其中国外车迷问卷6份
珠海莲花路商业街调查
国家计算机等级考试二级证书