A．至少一万名 B．不到一万名 C．一万名左右 D．正好一万名

a mol Fe与一定量的硝酸在一定条件下充分反应，将生成的气体与标准状况下bgO₂混合，恰好能被水完全吸收，则a和b的关系可能是（　　）

A．0.5a≤b≤0.75a

B．16a≤b≤24a

C．0.2a≤b≤0.3a

D．无法确定

短文改错（共10小题；每小题1分，满分10分）

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文。

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。

I will share with you a true story happened a couple of days ago. One of my classmate bought a bag of snacks from a food store. A few roommates were then invited to enjoy snacks. Unluckily, all of them got poisoned and had stomachaches with our faces pale. They are quickly sent to a nearby hospital. Doctors examined them but gave them some medicine. They were out of danger soon before taking the medicine. This accident should make us to realize the seriousness of the food safety problem. I strong suggest that the whole society pays more attention to food safety.

粘土的结合水量与粘土的阳离子交换容量成正比。

基底细胞癌照射范围包括肿瘤边缘外（）。

A.3.5～4cm

B.3～3.5cm

C.2～3cm

D.1~2cm

E.<1cm