皮皮学，免费搜题
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【简答题】
听对话。根据所听内容选择正确的答案。对话读两遍。 1. Where are the two speakers? A. On the bus. B. In the street. C. In a restaurant. 2. Why doesn't David get up? A. Because he is late. B. Because he doesn't want to go to school. C. Because his head hurts. 3. What does the woman mean? A. They should keep quiet everywhere. B. They should read books. C. They should keep quiet in the reading room. 4. What do you think the man is? A. A doctor. B. A policeman. C. A worker. 5. After you get on a bus, what do you have to do? A. Buy a ticket. B. Find a seat to sit on. C. Stand in line.
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皮皮学刷刷变学霸
举一反三
【单选题】下面关于系统分类,错误的说法是
A.
双风道系统，由于能够同时实现供冷供热，所以工程应该提倡
B.
单风道、定风量、低速空调系统是工程常用的
C.
变流量系统是指负荷变化时，改变进入表冷器的水流量来适应负荷的变化的系统。
D.
送入空调房间的风量随负荷变化的系统为变风量系统
【简答题】点火开关常见的挡位有_____ 、____ 、______ 、______ 、______