2011年3月26日20：30-21：30，“地球一小时”再次引发全球城市、企业_爱下问搜题

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问题选择题

2011年3月26日20：30-21：30，“地球一小时”再次引发全球城市、企业和个人的自愿参与，“低碳生活”成为热门话题．下列不属于“低碳生活”方式的是（　　）

A．夏天为了更凉快，把室内空调温度设置到很低

B．自带购物袋，不使用一次性塑料袋

C．在生活中提倡使用节能技术和节能用具

D．提倡乘坐公共交通工具、骑自行车或步行等出行方式

答案

A、使用电源，把室内空调温度设置到很低，从而达不到节约化石燃料的作用，不利于减少二氧化碳的排放，故A错误；

B、出门购物，自己带环保袋有利于减少二氧化碳的排放，故B正确；

C、节约能源，从而减少化石燃料的使用，有利于减少二氧化碳的排放，故C正确；

D、多步行，骑自行车，尽量选用公共汽交通，少开车，是减少化石燃料的利用，故D正确．

故选A

完形填空

Years ago, if a teenager had some problems in his life, he might go home and write in his diary; now, a teenager with the    36   problems might go onto the Internet and write about them in a blog(博客). In many ways, a diary and a blog are very   37  , but what makes blogging different from writing in a(n) 38  diary?
The biggest difference is that a blog is much more   39  than a diary. Usually, a teenager treats his diary like a book full of   40  that he does not want to   41  with others.
It’s interesting that someone who writes in a blog   42 a diary will probably write nearly the same information.
I have a little sister, and sometimes I go online to read her 43 . She writes about things like waking up early for swimming practice and not studying enough for her chemistry test.
44 I was her age, I wrote about the same thing, but   45  in my diary. Then, after I had finished writing, I would hide my diary in a secret place because I was   46 that my sister might read it.
The biggest   47  with blogging is that anyone can read what you write. If I was angry with a friend during high school and wrote something 48  about him in my diary, he would never know.   49 , if my sister ever wrote something bad about a friend, that friend might
50  her blog and get angry.
There are also   51  to blogging, of course. If I was feeling sad one day and wrote in my diary “ Nobody cares about me …”, no one would   52  about it. However, if my sister wrote the same sentence in her blog, her best friend would quickly   53  and tell her how much they   54  her. Blog helps people   55  in contact with their friends and know what the people around them are doing.

B．interesting

D．traditional

C．shortcomings

单项选择题

圆管流速很慢，其速度分布为绕圜管中心旋转抛物线，u=um（1-（r/r0）2）则断面平均速度是最大速度的（）倍。

A.0.6

B.0.5

C.0.8

D.0.7