问题
选择题
下图是活性炭净水器的示意图，有关说法正确的是
A．它可以除去水中的不溶性杂质、色素、部分臭味
B．它能把硬水转化成软水
C．它要求水从下进，从上出是为了操作方便
D．它可以杀灭所有的细菌和吸收有毒重金属
答案
答案：A
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下图是活性炭净水器的示意图，有关说法正确的是
A．它可以除去水中的不溶性杂质、色素、部分臭味
B．它能把硬水转化成软水
C．它要求水从下进，从上出是为了操作方便
D．它可以杀灭所有的细菌和吸收有毒重金属
答案：A
Good morning, boys and girl. Today I’ll give a talk about going online. We know that there are too many net bars around us. The Internet can make our lives interesting and enjoyable（令人愉快的）. Many of us like going online very much because we can learn how to use the computer. We can learn English and read some newspapers and magazines to know more around us. It can make us clever in playing computer games. Also when we can send e-mails to our friends， they can get them at once. It can help us contact（交流） people from all over the world. But some students spend too much time playing computer games and some stay in the net bars all day and all night. Some girls even get to have boyfriends or some boys get to have girlfriends online. They write too many letters to each other. It takes them too much time to chat online so they do worse in their lessons and they don’t study well any more. I think we mustn’t get online when it is time for us to study. We can do it in summer or winter holidays. I think we should get online with our teachers or parents. At the same time, if we have lots of free time, we can do some activities after school. We usually have activities from 4：50 to 5：50 in the afternoon . You can play basket ball or football. We also have some interest groups in school, such as drawing, singing and dancing. We can go to the English corner on Monday afternoon. We hope we can spend more time on our subjects or on such activities that we can learn a lot from and less time on the Internet.
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