5. We can know from the passage that ________.

A. the reason why ageing takes a greater loss on the male heart has been found out

B. scientists are on the way to finding out why the male heart loses more of the cells

C. the team has done something to prevent the male from suffering the greater loss

D. women over 70 could lose more heart cells than those at the age of 20

(二)

Wugging, or web use giving,, 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, 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.

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, then makes monthly payments to every registered charity. Launched in June 2005, is now the eighth largest search engine and one of the busiest charity websites in the UK.

4. If you want to live longer, you should ________.

A. enable your heart to beat much faster

B. find out the reason for ageing

C. exercise regularly to keep your heart healthy

D. prevent your cells from being lost

3. According to the text, the UK scientists have known that ________.

A. women have more cells than men when they are born

B. women can replace the cells that enable the heart to beat

C. the female heart loses few of the cells with age

D. women never lose their pumping power with age

2. The text mainly talks about ________.

A. men’s heart cells

B. women’s ageing process、

C. the gender difference

D. hearts and long life

1. The underlined word “longevity” in the second paragraph probably refers to “________”.

A. health

B. long life

C. ageing

D. effect

31．(8分)

猜想①：滤液中的溶质有　　 碳酸钠、氯化钠　　 ；

猜想②：滤液中的溶质有　　　 氯化钙、氯化钠　　 ；(1分)

猜想③：滤液中只有　 氯化钠　　　　　　　　　 。(1分)

(合理答案均可)

30．(6分)(每空1分)

Fe ₂O₃ + 3CO =====2Fe + 3CO₂

(2)钢

(3)不合理，该实验方案没有能充分说明铁钉锈蚀与空气中的氧气有关，因此，还需要增加一个铁钉锈蚀与空气中的氧气是否有关的对比实验。

(4)在久置不用的菜刀表面涂一层植物油；厨房里的铁锅用完后，用水洗净、擦干等

29．(4分)(每空1分)

(1)红色逐渐退色，降低

(2)具有挥发性；具有酸性、与氢氧化钠溶液反应等(合理答案均可)

28．(7分)(每空1分)

(1)托盘天平；玻璃棒

(2)EADCB；95

(3)最低

(4)称量；加快NaCl的溶解

27．(6分)

(1)Ba(OH)₂；Na₂SO₄(各1分)

(2)Ba(OH)₂+Na₂CO₃== BaCO₃↓+ 2NaOH　 (2分)

　　 BaCl₂+Na₂SO₄== BaSO₄↓+ 2 NaCl　　 (2分)

(合理答案均可)