题目

根据短文内容及首字母提示，填写所缺单词，将答案按序号填入下面表格内。     Reading books is a good hobby for all kinds of reasons.     First, reading books is f  1  . You can always keep yourself interested and help you to have an enjoyable time if you like reading. This is especially u  2   when the weather is bad. It is a relaxing hobby too. You can really become lost in a book.    Next, you can read a book a  3  : in a car, in a waiting-room, on a plane, in bed —even in the bath. All you n  4   is a book! Reading is a convenient h利用化学反应2Na＋H22NaH可实现氢气的存储，计算230 g金属钠最多可吸收氢气的质量。