问题描述：
[单选]
第一级滤芯能去除吸附水中的余氯，异色异味，部分有机物及改善口感，滤芯更换周期为1年。
A．对
B．错
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答案解析：无
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上一篇：第二级滤芯吸附水中余氯和部分有机物，拦截水中细菌（总大肠杆菌群），胶体等杂质，滤芯更换周期为2年。
下一篇：阅读短文，判断句子正（T）误（） （完成1—5小题）Christmas is a very important festival （节日） in western countries ． It is on December 25th． In the days or even weeks before Christmas Day ， many people decorate （装饰） their homes and gardens with lights ， Christmas trees and much more ． During Christmas ， people don "t go to work ． Children don "t go to school ． Most families get together and have a big dinner ． Children like Christmas very much because they can get a lot of gifts ． They especially like the gift from Santa Claus．（1）、Christmas is a very important in western countries．
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