下图为以塔里木盆地某点（O）为中心，向a、b、c三个方向绘制的地形剖面图。回答下

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，修改或删除。

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，并在该词下面写出改正后的词。

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。

Last Sunday I am about to leave the Green Lake Park when I met a foreign visitor whose seemed to be lost. I tried to help him but I found we had difficulty in understand each other because of my poor English. Just at that moment, tall young lady came to our help. He spoke very good English. With her help, the foreign visitor finally found the way but I learned some English as well. Before he left, the foreigner thanked to us for our kindness. I was very exciting that day. This experience have made me realize that English is real useful and worth learning. I will work hard at it from now on.

急性肾功能衰竭少尿期病人常见的死亡原因是（）。

A.低钠血症

B.高钾血症

C.酸中毒

D.低钙血症

E.高磷血症

椭圆齿轮流量计和腰轮流量计在垂直管道上安装时，管道内流体流向应（）。

A．自左向右

B．自上而下

C．自右向左

D．自下而上

破伤风抗毒素的作用

A．中和体内游离毒素
B．杀灭破伤风毒素产生
C．抑制破伤风杆菌生长
D．清除毒素来源
E．减少破伤风毒素产生

保险人对各类专业技术人员在从业中因疏忽或过失而造成他人人身伤害或财产损失依法承担经济赔偿的一种保险是( )。

A．单独承保责任保险

B．雇主责任保险

C．职业责任保险

D．公众责任保险