矿物质结合水或结晶水是不是包含在全水中？
参考答案：
不是，它是煤中无机物晶格的一部分，主要存在干煤的粘土和页岩矿物杂质中，通常在2000C以上才能分解。
阅读理解
Lily is from New York , the U.S.A. She is twelve. She is in Shanghai NO.3 Junior High School. She
is in Class Eight, Grade One. Her phone number is 66786019. Dongdong is from Kunming. His English
name is Tom. He is eleven .He is in Class Seven,Grade One. His telephone number is 24524233. They
are not in the same class. They are good friends.
阅读短文，补全下列句子(每空一词)。
1. Lily is in No. ____ Junior High School..
2. Dongdong is in Class ____ .
3. Lily and Dongdong are good ________ .
4. Tom is from _________ .
5. Lily is _______ years old.
确定线路有效长的标志之一是（）。
