问题 多项选择题

某空调房间,恒温精度为20±1℃,房间的长、宽、高分别为5m、4m、3.6m,采用单侧上送风,同侧下回风方式,送风射流相对贴附长度x/d0为40,下列哪几个气流组织设计是错误的?()

A、送风射流的Ar=0.003

B、送风射流的轴心温差Δtx=0.8℃

C、送风温差7℃

D、空气调节换气次数为3次/h

答案

参考答案:A, D

阅读理解

Dear Editor,

I’m now busy in preparing for the Postgraduate (研究生) Entrance Exam. A few days ago, I happened to see some new guidebooks for those who want to take next year’s exam. With too many hopes and without taking it into too much consideration, I bought several that were written by some known for helping candidates (应试者) for master’s degrees.

What made me really angry was the starting discovery that the contents of those books were almost exactly the same as some I had bought before. There were only superficial (外表的) changes in their covers, with more attractive new titles and better designs. The contents were the same.

People say that the publishing industry is in a state of chaos (混乱) these days but I used to be doubtful abut that. I was of the opinion that only people of noble character, prestige (威望), and exceptional talent would produce books for higher education. But these editors are caring little about their readers.

I hope that authors and publishing houses will be more responsible for their readers. Don’t destroy the image that you have with your readers.

小题1:The writer bought some guidebooks in order to ___________________________.

A.write an essay on guidebooks

B.prepare for the entrance exam

C.give his students a lecture

D.send them to his good friends小题2:The writer was angry because _________________________________________.

A.there were a lot of printing mistakes in the books that he had bought

B.the books were so expensive that he couldn’t afford any of them

C.he found the books he had bought were thin but of poor quality

D.the books had the same contents as what he had bought before小题3: In the writer’s opinion, publishers should be _____________________________.

A.responsible

B.kind-hearted

C.hard-working

D.creative

单项选择题