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，并在其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。

A boy does not become a man on the same age everywhere in the world. Many people in American feel that a boy becomes a man when he is 18 years old. It’s different from an Eskimo boy. An Eskimo boy becomes man when he kills his first polar bear. The polar bear, which may be 9 feet long and weigh 1,000 pounds, is a very dangerous animal. To kill it takes a great deal of courage and skills. The boy who can kill a polar bear have developed the skills and courage needed to be a hunter--- and a man.  Polar bears gave the Eskimos meat to eat it, skins for clothing, and oil for heating and lighting. A boy who can supply all this things has certainly become a man.   

实验室制取气体所需装置如下图所示，请回答以下问题：

（1）图中标示仪器的名称（1）       ，（2）     。

（2）实验室选用B和E装置可以制取的气体是     ，一般不用c装置收集CO₂的原因是

     。不选用D装置收集CO₂的原因是    ,实验室如选用G装置收集二氧化碳，气体应该从     端进入。

（3）用高锰酸钾制取氧气时，选用的发生装置是     ，反应的化学方程式为     。如果要制得较纯净的氧气应该选择装置     收集。