问题
单项选择题
机械排烟管道材料必须采用()
A．不燃材料
B．难燃材料
C．可燃材料
D．A、B两类材料均可
答案
参考答案：A
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机械排烟管道材料必须采用()
A．不燃材料
B．难燃材料
C．可燃材料
D．A、B两类材料均可
参考答案：A
| 完形填空。 Everyone needs friends. We all like to 1 close to someone. 2 is nice to have a friend to talk, laugh, and do things with. 3 , sometimes we need to be alone. We don't always want people 4 . But we would feel lonely if we never have a friend. No two people are 5 . Friends sometimes don't get on well. That doesn't mean they no longer like each other. Most of the time they will make up and become 6 again. Sometimes friends move away. Then we feel very _ 7 . We miss them very much, and we can call them and write to them. It could be that we could even see them again. And we can 8 new friends. It is surprising to find out how much we like new people when we get to know them. There's more good news for people who have friends. They live longer than people who don't. Why? It could be that they are 9 . Being happy helps you stay well. Or it could be just knowing that someone cares. If someone cares about you, you take 10 care of yourself. | |||
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