题目

 完形填空。 Hi! My name is Li Weikang. I’m fourteen years old. I’m  1  Class 4, Grade 7. Today I’d like  2  you something about our classroom. We   3  a big and bright(明亮的)classroom. There are twenty-four boys and twenty-two girls in our class. So there are  4 desks and chairs in the classroom. There are two blackboards in it,  5 . In front of one blackboard, there is a  6  desk. Some flowers are on it. There are two maps  7  the wall. One is a map of China, and  8 is a map of the world(世界). There is a book shelf  9  the back of the classroom. We 2010年我国西南的旱灾提醒人们应合理使用水资源．下列说法不正确的是（　　）A．灾区饮用水源应尽量远离人畜生活区B．水质浑浊时可加入明矾使杂质沉降除去C．饮用水（H2O）和消毒剂过氧化氢（H2O2）都由氢元素和氧元素组成D．干冰能用于人工降雨的原因是干冰与云发生化学反应生成水