马弗炉的结构？

改错

       假定英语课上老师要求同桌之间交换修改作文，请你修改你同学写的以下作文。文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号,并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1. 每处错误及其修改均仅限一词；      

            2. 只允许修改10处，多者（从第11处起）不计分。

     After school I went to home for supper. When I got home, I found my mother laying in bed. She was

ill. Unluckily , my father was away from home in business. "What shall I do?" I thought to me. Since

Mother was ill, I must take well care of her. So I decided to try cooking by myself. I did the cooking

with great difficulty but it got burnt at last. I had thought Mother would never like. To my joy, Mother

praised me for the meat I have cooked. She said,"It tastes delicious. I'm very pleasing with it." I knew

Mother was encouraging us to do more by myself.

当长方体中长等于宽时，有几个面是正方形，有几条棱一样长？

GB/T 19000-2000族标准质量管理八项原则中，持续改进的整体业绩应当是组织的一个永恒的（）。

A．任务

B．方针

C．政策

D．目标

下列应列入海关统计的是( )。

A．以易货贸易方式进出口的货物

B．以边境小额贸易方式进出口的货物

C．无进出口经营权的单位经批准临时进出口货物

D．暂时进出口货物

硬件是计算机系统中物理装置的总称。