问题 单项选择题

某医院病房区采用理想的温湿度独立控制空调系统,夏季室内设计参数tn=27℃,φn=60%。室外设计参数:干球温度36℃、湿球温度28.9℃[标准大气压、空气定压比热容为1.01kJ/(kg·K),空气密度为1.2kg/m3。已知:室内总散湿量为29.16kg/h,设计总送风量为30000m3/h,新风量为4500m3/h,新风处理后含湿量为8.0g/kg干空气,问:系统的室内干式风机盘管承担的冷负荷应为下列何项(盘管处理后空气相对湿度为90%)查h-d图计算,并绘制空气处理的全过程(新风空调机组的出风的相对湿度为70%)。()

A.39~49kW

B.50~60kW

C.61~71kW

D.72~82kW

答案

参考答案:B

解析:

风机盘管处理到相对湿度为90%时,温度为20.3℃;

Q=cmΔt=1.01×(30000-4500)×1.2/3600×(27-20.3)=57.5kW。

阅读理解

Are you looking for some new and exciting places to take your kids to? Try some of these

places:

Visit art museums

They offer various activities to excite your kids' interest. Many offer workshops for making

land-made pieces, book signings by children's favorite writer, and even musical performances

and other arts.

Head to a natural history museum

This is where kids can discover the past from dinosaur models to rock collections and

pictures of stars in the sky. Also, ask what kind of workshops are prepared for kids and any special events that are coming up.

Go to a youth centre

Look for one in your area offering plays for child and family visitors. Pre-show play shops

are conducted by area artists where kids can discover the secret about performing arts- puppet(木偶)making .

Try hands-on science museum

Visit one of the many hands-on science museums around the country. These science play-lands are great fun for kids . They'll keep your child mentally and physically active the whole day through experimenting and building.

小题1:If a child is interested in the planets, he probably will visit

A.a youth centre

B.an art museum

C.a natural history museum

D.a hands-on science museum小题2:What does "hands-on science" mean in the last paragraph?

A.Science games designed by kids.

B.Learning science by doing things.

C.A show of kids' science work.

D.Reading science books.小题3:. Where does this text probably come from?

A.A science magazine.

B.A tourist leaflet.

C.A museum guide.

D.A local newspaper.

单项选择题