问题
单项选择题
下列关于城市供热网形制的说法中，不正确的是( )。
A．根据热源与管网之间的关系，热网可分为区域式和统一式两类
B．根据输送介质的不同，热网可分为热水管网和蒸汽管网两种
C．按平面布置类型，热网可分为枝状管网和环状管网两种
D．根据用户对介质的使用情况，热网可分为开式和闭式两种
答案
参考答案：B
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下列关于城市供热网形制的说法中，不正确的是( )。
A．根据热源与管网之间的关系，热网可分为区域式和统一式两类
B．根据输送介质的不同，热网可分为热水管网和蒸汽管网两种
C．按平面布置类型，热网可分为枝状管网和环状管网两种
D．根据用户对介质的使用情况，热网可分为开式和闭式两种
参考答案：B
| 阅读理解。 | ||||
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| 1. What's the subject of this e-mail? | ||||
| A. Books on sale. B. Invitation to a party. C. Going shopping | ||||
| 2. Li Fang will buy some books _____. | ||||
| A. after the English exam B. before the English exam C. after the physics exam | ||||
| 3. What's Wang Le's favorite subject? | ||||
| A. History. B. Computer. C. Science | ||||
| 4. Will Wang Le go to the bookstore with Li Fang? | ||||
| A. We don't know. B. Yes, he likes it. C. No, I don't think so. | ||||
| 5. From the passage we know _____. | ||||
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