—The old man always lives in the small house .
— Does he feel ?
A：alone; lonely
B：alone; alone
C：lonely; lonely
D：lonely; alone
Hello, I'm Tom. I'm ____ and ____. I do exercise every morning. I run for 30 ____. I ____ eat vegetables and fruit. I don't eat too much meat. Because it's ____ for me. I work hard at school and at sports. Sometimes I help my parents at home.
物质密度
盐水
牛奶
酒精
汽油
（×103kg/m3）
1.1
1.13
0.8
0.71
下列关于热化学反应的描述中正确的是
