问题 单项选择题

从可持续发展观点出发,考虑建筑全寿命周期中(包括自建材生产开始、施工安装、建筑运行、建筑报废拆卸解体至再生利用)的能耗,下列哪类建筑能耗最大()

A.一般木造结构 

B.钢筋混凝土结构(工厂生产) 

C.轻钢结构(工厂生产) 

D.劲性钢筋混凝土结构(单元式集合住宅)

答案

参考答案:C

解析:

清华大学和北京工业大学于2009年6月29日在上海发布了题为“多层多户式轻型木结构建筑与其他结构建筑全寿命周期能耗和环境影响的研究”的研究报告。研究结果显示:在整个生命周期内,三类建筑物的总能耗以轻钢结构建筑物消耗最大,其次为混凝土结构建筑物,木结构建筑物的生命周期能耗最小。轻钢结构建筑物的能耗比混凝土结构建筑略高1%,比木结构建筑大31%,而混凝土结构建筑的能源消耗比木结构高30%。

阅读理解

     Pushing children too hard is a really big social problem that seems to be getting worse. Now we

have 6montholds in music classes and swimming classes. Parents fear that if other children are attending

these classes, they will be holding their own children back if they do not enroll, too.

     The other extreme, simply taking a_laissezfaire_approach and letting children do-or refuse to

do-whatever they want, is not the answer either, of course.

     Dr. Taylor emphasizes that parents need to push their children based on what is best for children, not

what is best for themselves. If children understand that an activity is in their best interests,then they will

accept it, he finds.

     Dr. Taylor and other family experts remain pessimistic about the possibilities for widespread social

change. "The force of our popular culture, driven by money and superficial(表面上的)values, cannot

be resisted," he says. But change can take place at a "microlevel", in families and schools.

     When change does occur, the rewards can benefit everyone in the family. One mother supporting this

new approach toward parenting mentions the advantages her family experienced after her children cut

back on activities. "The biggest thing is that since we have done this, we are rested," she says. "Not only

are our kids rested, because they're not in a ton of stuff, but my husband and I are rested, because we're

not driving them everywhere. We weren't living in the moment when we were always busy. We were

living by the schedule. The return on our investment of spending time together has been enormous."

1. One of the reasons why parents push children so hard is that they ________.

A. believe in early development in children

B. are too busy to take care of their children

C. don't want their children to lag behind

D. want to repeat what their parents did to them

2. The phrase "a laissezfaire approach" (in Paragraph 2)most probably refers to ________.

A. denying them what they need

B. controlling children in a flexible way

C. developing a keen interest in children

D. letting children do whatever they want

3. The best way to encourage children to work hard is ________.

A. to make them believe it's in their best interests

B. to consider the matter from parents' standpoint

C. to emphasize the importance of hard work from time to time

D. to make it interesting and enjoyable to them

4. What the author doesn't approve of in the essay is ________.

A. achieving a balance between pushing children too hard and leaving them alone

B. going from one extreme of pushing children too hard to the other of leaving them alone

C. involving children in activities that will probably contribute to their development

D. enrolling them in classes that are best for children

5. The new approach toward parenting mentioned in the passage most likely refers to ________.

A. relieving children's hard work and unnecessary activities

B. resisting the superficial values of pop culture

C. reducing more activities off their school schedule

D. spending more time with their children

单项选择题