lin2000west
你确定这是单词?我们一般都说A4. A指A系列纸张的规格是指纸张制成后,经过修整切边,裁成一定的尺寸。过去是以多少"开"(例如8开或16开等)来表示纸张的大小,现在我采用国际标准,规定以A0、A1、A2、B1、B2......等标记来表示纸张的幅面规格。标准规定纸张的幅宽(以X表示)和长度(以Y表示)的比例关系为X:Y=1: 。按照纸张幅面的基本面积,把幅面规格分为A系列、B系列和C系列,幅面规格为A0的幅面尺寸为841mm×1189mm,幅面面积为1平方米;B0的幅面尺寸为1000mm×1414mm,幅面面积为2.5平方米;C0的幅面尺寸为917mm×1279mm,幅面面积为2.25平方米;复印纸的幅面规格只采用A系列和B系列。若将A0纸张沿长度方式对开成两等分,便成为A1规格,将A纸张沿长度方向对开,便成为A2规格,如此对开至A8规格;B8纸张亦按此法对开至B8规格。A0~A8和B0~B8的幅面尺寸见下表所列。其中A3、A4、A5、A6和B4、B5、B6 7种幅面规格为复印纸常用的规格。
Lucy…黄小猪
I like to make friends, I can share my happiness and sorrow with friends. Friends are very important part of our lives, without them, I will be very lonely. I learn it when I was very small. It was Friday, I went to school to join the English contest, before I went into the classroom, I found I did not bring the admission card, I felt so worried, without admission card, I could not walk into the classroom. My friend Li looked at me and asked me what happened, I told him the truth, then he asked me to stay here and he rushed to our classroom. Ten minutes later, he came back with my admission card. I was so thankful, friends are very important.我喜欢交朋友,我可以和朋友们分享我的喜怒哀乐。朋友是我们生活中很重要的一部分,没有朋友,我会感到很孤单。我在很小的时候就学到了这点。那是星期五,我去学校参加英语竞赛,在我走进教室之前,我发现我没有带准考证,我感到很担忧,没有准考证,我就不能走进教室。我的朋友李看着我,问我发生了什么事情,我告诉他实情,然后他叫我留在原地,他急忙跑去我们的教室。十分钟以后,他带着我的准考证回来了。我很感激,朋友是很重要的。