黄金分割线中，最为重要的三个数字为( )。 A．0.618 B．1.618 C．3

（6分）金属在生成生活中应用广泛。

⑴最初输水管材用铸铁，目前多用塑料管和塑料金属复合管，输送热水一般用铜管。下列管材中，实验金属材料的是____    __(填字母序号，下同)。

A．铸铁管               B．铜管            C．塑料管

⑵铁生锈的条件是______     ____。将生锈的铁片放在硫酸和硫酸铜的混合溶液中，可能发生的置换反应的化学方程式是________________          __、_________________            ______。

⑶金属的回收和利用是保护金属资源的一种有效途径。

①废钢铁可回收重新冶炼，用一氧化碳还原氧化铁的化学方程式为_________            _______；

②将铁粉和铜粉的混合物放入硝酸银溶液中，反应结束后，对剩余固体成分的判断正确的是______。

A．肯定有银         B．肯定有铜         C．可能有铁         D．可能是铁和银

钢架支护不得侵入二次衬砌( )cm。

A．5
B．15
C．20
D．30

阅读理解。

     On August 15th, in the women's individual all-around final of gymnastics of the Beijing 2008 Olympic

Games, Chusovitina is a shining star although she failed to win a medal eventually.

     When 33-year-old Oxana Chusovitina competes in her fifth Olympics (Beijing Olympics), she is twice

the age of most of her competitors. In addition, she has also competed in ten World Championships, three

Asian Games and three Goodwill Games. Chusovitina holds the record for the most individual World

Championships medals on a single event. She won an Olympic team gold medal as a 17-year-old in 1992.

Since then she has won a record of eight world titles.

     Her long career owes something to fate. In 2002, when her son Alisher, now aged nine, was diagnosed

with leukemia (白血病), she moved to Germany so that he could get the best possible treatment. To help in

those difficult times she kept up her training. It has paid off. But saving Alisher's life is not her only motivation.

As she recently told German media, "There is nothing in the world I enjoy more than gymnastics."

     Chusovitina was born on June 19, 1975 in Uzbek USSR. She was formerly a citizen of, and a competitor

for, the former Soviet Union (before 1993) and Uzbekistan (1993-2006). She has competed for Germany

since 2006. By the year of 2008, Chusovitina's career in gymnastics had been twenty years.

     She is one of only a handful of women to return to high-level gymnastics and international competition

after becoming a mother. Chusovitina is remarkable in her ability to remain competitive for so many years,

often in the face of great difficulty, and has been considered as a role model and an inspiration by many people

in the gymnastics community.

1. When she was 17 years old, Chusovitina won an Olympic team gold medal for _____.[ ]

A. the former Soviet Union

B. Uzbekistan

C. Germany

D. Russia

2. Chusovitina might begin her career in gymnastics in _____. [ ]

A. 1975

B. 1988

C. 1992

D. 1992

3. Chusovitina left her homeland because _____. [ ]

A. she wanted to compete in the Beijing 2008 Olympic Games

B. she wanted to serve for Germany

C. she wanted her son to get the best treatment

D. she had to face great difficulty in her homeland

4. According to the passage, Chusovitina is different from the other competitors in the Beijing 2008 Olympic

    Games because _____. [ ]

A. she is the best competitor in the games

B. she is much older than other gymnastics girls

C. she won an Olympic team gold medal when she was very young

D. she competes in order to earn money

5. According to the passage, which of the following words can best describe Chusovitina? [ ]

A. Kind-hearted.

B. Lovable.

C. Tough-minded.

D. Serious-minded.

态度与品德作为社会学系的一项内容，可以通过观察、模仿榜样的行为而习得。