(6分)韩国“岁月号”沉船事故发生后,几百名潜水员参与了打捞工作,他们携带的水下

题型:计算题

问题:

(6分)韩国“岁月号”沉船事故发生后,几百名潜水员参与了打捞工作,他们携带的水下供氧设备中供氧剂是过氧化钠(Na2O2),它与人呼出的二氧化碳及水蒸气反应生成氧气供人呼吸.某同学想进一步探讨过氧化钠与水的反应(2Na2O2+2H2O═4NaOH+O2↑),将15.6g过氧化钠加入盛有147.6g水(过量)的烧杯中充分反应,直至固体完全消失,不再有气泡产生.请计算:

(1)反应生成的氧气质量;

(2)反应后所得溶液中溶质的质量分数.

考点:化学反应方程式的计算
题型:计算题

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 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 (有感染力的) 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” movement 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 website

B.a charity-related action

C.a school organization

D.a student movement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小题5:What would be the best title for this passage?

A.“Wugging”, a new popular term on the Internet.

B.British people show strong interest in charity.

C.More Britain charities benefit from the Internet.

D.Students raise money for charity by “wugging”.

题型:计算题

胃十二指肠溃疡病,下列哪种情况不需外科手术治疗()

A.胃十二指肠瘢痕性幽门梗阻

B.胃十二指肠溃疡急性穿孔,腹腔污染严重

C.溃疡恶变

D.36岁的男性病人,因十二指肠溃疡引起严重腹痛

E.复合溃疡,经正规内科治疗无效

题型:计算题

工程量输出表达式里可实现函数组合判定,下列说法不正确的是()

A.可对本身属性、系统变量、中间变量进行引用

B.可对软件内置的合法函数进行引用

C.可对构件的钢筋属性变量进行引用

题型:计算题

造成伦敦烟雾事件的大气污染物是

A.氮氧化物

B.碳氢化物

C.烃类化物

D.烟尘利二氧化碳

E.多环芳烃化合物

题型:计算题

符合API/IP1529或BS3158(EN1361)C类标准的飞机加油胶管,从生产日期起最长储存期限为()。

A.1年

B.2年

C.3年

D.6年

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