用内装50ml吸收液的多孔玻板吸收瓶采集氮氧化物,以0.2L/min流量采样时,玻板

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问题:

用内装50ml吸收液的多孔玻板吸收瓶采集氮氧化物,以0.2L/min流量采样时,玻板阻力为()kPa,通过玻板后的气泡应分散均匀。

A.1~2

B.3~4

C.5~6

D.7~8

E.8~9

考点:环境监测上岗考试环境空气采样环境空气采样题库
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我会照样子写字。

 例:多   羽(    )(    )(    )(    )

        品   鑫(    )(    )(    )(    )

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某校初三年级有两个班,在一次数学测验中,一班50人的平均分是82分,二班45人的平均分是80分,则这次测验全级的平均分是 ▲ 分。(精确到0.1)

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混凝土浇筑完成后,应在()h以内覆盖并洒水养护。

A.10

B.11

C.12

D.13

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Wugging, or web-use giving, describes the act of giving to charity at no cost to the user. By using Everyclick.com, which is being added to a number of university computers across the UK, students can raise money every time they search, but it won’t cost them a penny.

Research shows that students are extremely passionate about supporting charity — 88% of full time students have used the Internet to give to charity. This figure is high considering this age group is often the least likely to have their own income. 19% of 22 to 24 year olds have short-term debts of more than £5,000. With rising personal debt levels in this age group, due to university tuition fees or personal loans and a lack of long-term savings, traditional methods of donating to charity are often not appealing or possible.

Beth Truman, a 21 year old recent university graduate, has used everyclick.com to donate to her chosen charity, the RSPCA, for two years and has seen the “wugging” grow in popularity with students. “When you’re at university you become more socially aware, but it’s sometimes hard to give to others when you have little money yourself,” says Beth. “Wugging is great for people in this age group as it allows them to use the technology on a daily basis to give to charity, without costing them a single penny.”

Wugging is perfect for people who want to be more socially aware and supportive but don’t feel they have the means to do so. Students using the web can raise money for causes they care about without costing them anything in terms of time or money, and charities get a valuable source of funding.

Everyclick.com works like any other search engine, allowing users to search for information, news and images but users can decide which of the UK’s 170,000 charities they would like to support through their clicks. Everyclick.com then makes monthly payments to every registered charity. Launched in June 2005, Everyclick.com is now the eighth largest search engine and one of the busiest charity websites in the UK.

小题1:According to the passage, “wugging” is actually _______.

A.a student movement

B.a charity-related action

C.a school organization

D.a website小题2:In the case of charity, everyclick.com _______.

A.frees students of the financial worries

B.receives much money from students

C.offers valuable information to students

D.praises students for their money-raising小题3:What does Beth Truman think of the “wugging” movement?

A.It makes Everyclick.com popular in the UK.

B.It becomes easy to do charity because of it.

C.It results in students’ more social awareness.

D.It helps students to save money.小题4:From the passage, we can conclude that _______.

A.most full time students do charity on the Internet every day

B.Everyclick.com helps students pay for the college education

C.“wugging” is a win-win idea for both students and charities

D.Everyclick.com is the most successful search engine in the UK

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