座椅的电子设备中都装有静电放电敏感元件（） A.只要在分解，组装的过程中要求有防静电

有关羊奶营养价值的叙述，正确的是（）

A.蛋白质含量高于牛乳

B.乳清蛋白较高

C.铁含量高于人乳

D.叶酸含量低

E.缺乏维生素B₁₂

有两种以上违反治安管理行为的，分别决定，合并执行。行政拘留处罚合并执行的，最长不超过( )。

A．15日

B．20日

C．25日

D．30日

阅读理解。

    Paula Radcliffe, chasing (角逐) a third London marathon title (冠军), says she has

become a stronger person after her terrible experience at the 2004 Athens Games.

    Radcliffe, who failed to complete the Olympic marathon and the 10,000m last August,

said:"Athens made me a stronger person and it made me care about criticism (批评)."

    "In the past I wanted to please everyone, but now I am going to listen even more to

the people around me."

    She didn't care about criticism made at the weekend by Liz McColgan, who felt Radcliffe

should have rested and let her body recover after her failure in Athens.

    "Liz is someone I look up to but she hasn't spoken to me since last year and if she

really cared for me, I'm sure she would have contacted (联系) me."

    Instead Radcliffe won the New York City marathon just 11 weeks after Athens.

    "In New York I wasn't in my best state but I did know I was good enough to win the

race."

    Radcliffe insisted her only goal in Sunday's race would be winning a third title and

not chasing world records.

    However, Radcliffe has not ruled out (排除) in the future chasing her "final" world

record time and questioned sayings that marathon runners have the ability in their career

to produce only four or five world-class times.

    "I don't think that-although I can't put a number on it," said Radcliffe. "That changes

from person to person."

    Radcliffe is sure she can better her winning London 2003 performance some point in the

future. Following a successful three-month training period in the United States, the

31-year-old will chase a third title on Sunday after her first victory in 2002 and again

12 months later.

    Radcliffe clocked a time 2:18:56 in her first 42.2-kilometre race three years ago.

    Afterwards she set a "mixed course" mark of 2:17:18 five months later in Chicago before

lowering that to a time of 2:15:25 in the 2003 London event.

1. Radcliffe's failure in Athens made her _____. [ ]

A. face criticism bravely

B. rest for five months

C. love people around her more

D. develop respect for Liz

2. Which of the following is true according to the passage? [ ]

A. Radcliffe broke the world record in the New York City marathon.

B. Radcliffe didn't fully recover before the New York City marathon.

C. Radcliffe won her first marathon title in the 2004 Athens Games.

D. Radcliffe had a 3-month training before the New York City marathon.

3. According to the text, Radcliffe has won _____ London marathon title(s). [ ]

A. one

B. two

C. three

D. four

4. What can we learn from Radcliffe's story? [ ]

A. Practice makes perfect. 　　　　　

B. Well begun is half done.

C. A friend in need is a friend indeed.

D. Where there is a will, there is a way.

硫及其化合物在自然界中广泛存在，运用相关

原理回答下列问题：

（1）如图表示一定温度下，向体积为10L的密闭容器中充入1molO₂和一定量的SO₂后，SO₂和SO₃(g)的浓度随时间变化的情况。

①该温度下，从反应开始至平衡时氧气的平均反应速率是      ；

②该温度下，反应2SO₂(g)+O₂(g) 2SO₃(g)的平衡常数为              。

（2）以黄铜矿（主要成分CuFeS₂）为原料，经焙烧、熔炼等使铁元素及其他有关杂质进入炉渣，将铜元素还原为铜。发生的主要反应为：

2Cu₂S(s)+3O₂(g) = 2Cu₂O(s)+2SO₂(g) △H ="-768.2" kJ·mol^－1

2Cu₂O(s)+ Cu₂S (s) = 6Cu(s)+SO₂(g) △H ="+116.0" kJ·mol^－1

①“焙烧”时，通入少量空气使黄铜矿部分脱硫生成焙砂（主要成分是Cu₂S和FeS，其物质的量比为1:2）和SO₂，该反应的化学方程式为：              。

②在熔炼中，Cu₂S与等物质的量的O₂反应生成Cu的热化学方程式为：      。

（3）用电解的方法将硫化钠溶液氧化为多硫化物的研究具有重要的实际意义，将硫化物转变为多硫化物是电解法处理硫化氢废气的一个重要内容。

如图，是电解产生多硫化物的实验装置：

①已知阳极的反应为：(x+1)S^2－=S_xS^2－+2xe^－，则阴极的电极反应式是：                  。

当反应转移xmol电子时，产生的气体体积为        （标准状况下）。

②将Na₂S·9H₂O溶于水中配制硫化物溶液时，通常是在氮气气氛下溶解。其原因是（用离子反应方程式表示）：             。

一般电炉的电极插入深度为电极直径的（）倍

A、0.5

B、1.0

C、1.5

D、2.0