American schools begin in September after a long summer holiday. There're two terms in a school year. The first term is from September to January, and the second term is from February to June. Most American children begin to go to school when they're five years old. Most students are seventeen or eighteen years old when they finish high school.
      High school students take only five or six subjects each term. They usually go to the same classes every day, and they have homework for every class. After class, they do a lot of interesting things.
     After high school, many students go to college(大学). They usually have to pay a lot of money. So, many college students work after class to get money for their studies.

2015年5月18日***访问拉美四国，查找智利、巴西、秘鲁、哥伦比亚的国家位置，应选择的地图（     ）

商场在汽车的____方向

①2013年，全国多个省市出现严重的雾霾天气．导致雾霾形成的主要污染物是____ （填字母）；

A．O₂             B．CO₂               C．PM2.5

②采用焚烧处理垃圾进行发电已在江苏投入使用．下列是生活中的常见垃圾．

A．废电池          B．易拉罐             C．玻璃瓶

在焚烧处理前，除废电池外，还有____（填字母）应剔除并回收，随意丢弃电池造成的主要危害是____．

③漂白粉可用于生活用水的杀菌消毒，工业上利用氯气和石灰乳制取漂白粉的化学反应方程式是____．