圆柱的高为6cm，它的底面半径为4cm，则这个圆柱的侧面积是（）_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

圆柱的高为6cm，它的底面半径为4cm，则这个圆柱的侧面积是（　　）

A．48πcm²

B．24πcm²

C．48cm²

D．24cm²

答案

答案：A

阅读理解

House For Sale
Red Rose Garden，Pudong
3-storey home，509 sqm total land area，428.8 sqm built-in, 312.9 sqm garden.
Asking RMB13 million (USDl.57 million).
MP: 13761973547 Tel: 021—58609228 Fax: 021—58609728

Job Wanted
Cherry, 24, a shining girl, good at oral English and putonghua. Now I am working at an international trade (国际贸易) company in Guangzhou. I am kind-hearted, hard-working and healthy. I would like part-time weekend work offering putonghua lessons to foreign friends. If you are interested, please e-mail me at cherryif@ hotmail.com.

Beijing Snow World Ski Park
Price: 18 yuan (ticket),
50 yuan／hour on weekdays and 70 yuan／hour at weekends,
120 yuan／four hours on weekdays and 190 yuan／four hours at weekends.
Tel: 010—69191617

小题1:If an Australian student wants to learn Chinese , he or she can __________.

A．call 021—58609228	B．fax 021—58609728
C．e-mail cherryif@hotmail.com	D．telephone 010-69191617

小题2: How many square meters is the garden of the house for sale?

小题3:Where is Cherry working now?

小题4:If Nick goes skiing in Beijing Snow World Ski Park，he has to pay more money on __________ than on Tuesday.

小题5: If you want to ski for eight hours on weekdays, how much money will you pay at least?

问答题案例分析题

某城市桥梁工程，采用钻孔灌注桩基础，承台最大尺寸为长8m、宽6m、高3m，梁体为现浇预应力钢筋混凝土箱梁。跨越既有道路部分，梁跨度30m，支架高20m。桩身混凝土浇筑前，项目技术负责人到场就施工方法对作业人员进行了口头交底，随后立即进行1号桩桩身混凝土浇筑，导管埋深保持在0.5～1.0m之间。浇筑过程中，拔管指挥人员因故离开现场。后经检测表明1号桩出现断桩。在后续的承台、梁体施工中，施工单位采取了以下措施：（1）针对承台大体积混凝土施工编制了专项方案，采取了如下防裂缝措施：①混凝土浇筑安排在一天中气温较低时进行。②根据施工正值夏季的特点，决定采用浇水养护。③按规定在混凝土中适量埋人大石块。（2）项目部新购买了一套性能较好、随机合格证齐全的张拉设备，并立即投入使用。（3）跨越既有道路部分为现浇梁施工，采用支撑间距较大的门洞支架，为此编制了专项施工方案，并对支架强度作了验算。

关于支架还应补充哪些方面的验算？