广告商经常因不择手段地操纵人们的喜好与需求而受指责。然而，有证据表明，有些广告商不仅

假定英语课上老师要求同桌之间交换修改作文，请您修改你同桌写的以下作文。文中共有10处语文错误，每句中最多有两处。每处错误仅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：把多余的词用斜钱（\）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．只充许修改10处，多者（从第11处起）不计分。

Dear Diana,

Thank you for the lovely day we have with you. It was so kind tor you to let us bring Anne's friend. Gina. Unfortunate, the only problem was the journey home. There had been a terrible accident on the highway and, for a result, there was a long line of traffic for at least six mile. In the end, we drove to a service station and waited there unless the road was clear. In the car park Gina nearly got knocked over as a car drove out far too quickly from behind a lorry. They finally dropped Gina off at her parents' and made our own way to home.

微机的主要输入设备有（）。

A.话筒

B.光笔

C.鼠标器

D.麦克风

现有两台流量和扬程均相等的水泵串联使用后，其扬程增加到90米水柱。问这两台泵的扬程各为多少？

下图是a-银环蛇毒引发机体免疫效应的部分示意图，请据图分析回答：

物质A是（），由细胞②（）（填该细胞名称）释放。