问题 问答题 简答题

晚上生产结束后,空调系统应通过变频调节,系统维持适当压差梯度,请问A级形式的FFU是否可关闭?

答案

参考答案:

如HVAC系统设自动化变频控制,经验证后可采取这种方式。另FFU即自循环风机,因只有自循环净化功能,而不影响风量平衡,在无操作人员从事产品生产时,应有可能关闭,总之,要根据风险评价结果来确定。

综合
阅读理解

Festival activities program

TIME AND PLACE

October 24~30:  9:00 a.m. ~4:00p.m

Oct.25~29:  12:00 p.m~9:00 p.m.

At Kerry Centre Hotel

Classroom area

1) English Taster Lesson

2) Food health-keeping method presentation Computer area

3) E-Photography and Techno Music

4) Education Software Demonstration

Internet Training area

SINA and Capital on- Line will provide Internet training for the public. The focus(焦点) will be on browsing the Internet; how to find useful information on the web and how to design an elementary Web page

Foyer activity area

5) The students from Beijing TV University for the Aged will provide calligraphy (handwriting demonstration)

6) Children activities Lectures

21st Century, the educational weekly of China Daily, will invite experts from English- speaking countries to hold lectures from 18:30 to 20:30 on Oct. 27 to 29 and in the daytime on Oct. 30.

60. A 70 -year- old teacher wants to see how to use writing brush well. He should go to ________.

A. Classroom area                     B. Computer area

C. Internet Training area                 D. Foyer Activity area

61. A person who is interested in internet can go to ____________.

A. Computer area at 9 .m. Oct. 30

B. Internet Training area at 11 a. m. Oct. 24

C. Classroom area at 8:00 p. M. Oct. 26

D. Lectures at 9:00 p. m. Oct. 29

62. The students of English Department have a chance to learn English at __________.

A. 9:00~9:45 a .m. Oct. 27             B. 15:00~15:45 Oct. 30

C. 17:15~18:00 Oct. 28                D. 12:00~12:45 Oct. 25

63. The underlined word "browsing" in the passage probably means ____________.

A. seeing everywhere

B. going here and there

C. staring everywhere

D. reading here and there in book, etc