乾隆四十九年(1784年)，满载美国货的“中国皇后号”帆船，经过长途航行到达中国

目前，全世界有60%的地区面临供水不足，许多国家正在闹水荒。特别是在人口集中、工商业发达的大城市，用水量大大超过当地水源的供应能力，缺水问题更为突出。据此回答1—2题。

1、新加坡为世界上最缺水的国家之一，其主要原因是

①新加坡的年降水量十分稀少

②新加坡的年降水量虽十分丰富，但境内没有河流

③新加坡的年降水量虽十分丰富，但地区分布与季节变化都十分不均匀

④人口的急增与经济的高速发展，对水的需求量大[ ]

A．③④

B．②④

C．①④

D．①②

2、解决水资源不足的问题，可以从“开源”和“节流”两个方面去采取措施。下列措施中，属于“节流”的是[ ]

A．海水淡化

B．跨流域调水

C．防治水体污染

D．节约用水，减少浪费

关于x的方程2（x-1）-a=0的解是3，则a的值为______．

肾上腺疾病分为肾上腺皮质疾病和髓质疾病两类。

肾上腺皮质疾病不包括（）.

A.肾上腺皮质功能亢进

B.肾上腺皮质功能不全

C.原发性醛固酮增多症

D.库欣综合征

E.节细胞神经瘤

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”.

模拟电话调制解调设备去加重网络用于恢复原发送端（）的原幅度分布，从而使基带内噪声分布比较均匀。

A、脉冲信号

B、基带信号

C、数字信号

D、模拟信号