椭圆x2m+y24=1的焦距为2，则m的值等于（ ） A．5或3 B．8 C．5 D．5

正常婴儿，每日每公斤体重需要热量 ()。

A．377～418kJ(90～1OOkca

B．418～460kJ(100～110kca

C．439～418kJ(105～100kca

D．460～502kJ(110～120kca

E．502～544kJ(120～130kca

有A、B、C、D、E、F、G、H、I九种常见物质，它们的转化关系（反应条件未注明）如图所示。其中B、C、D为单质，常温下D为固态，B、C、E、G为气态，F为淡黄色粉末，I的焰色反应为黄色。  

请回答：

（1）写出F的电子式__________，其化学键类型有______________。

（2）写出反应⑤的化学方程式__________ 。

（3）I的水溶液呈       性（填酸性、中性或碱性），原因（用离子反应方程式表示）____________。

（4）在①、②、③、④、⑤五个反应中，△H＞0的反应是____________（填序号）。

（5）在同主族氢化物的性质递变中，C的氢化物的沸点反常，这可以用__________来解释（填字母序号）；    

 A．共价健      B．离子键　　　C．氢键　　　D．范德华力

阅读理解。

     "Christmas comes but once a year" is a familiar phrase, and indeed for many people the 25th of December

is the highlight of the calendar (日历).

     But for one British man once a year is not enough. Andy Park, who is better known by his nickname

Mr. Christmas, has celebrated Christmas every single day for the last 14 years.

     The 44-year-old electrician claims to have eaten a full roast dinner every day for the last decade and a half,

munching over 5 000 turkeys, 117 000 Brussels sprouts, and around 30 000 roast potatoes in the process.

     He also sends himself a Christmas card every day and looks forward to unwrapping a present he has

bought himself each evening, while watching the Queen's Speech.

     Mr. Park estimates his festive love costs him ￡150 (1570 yuan) a week. This year, however, he says he

is short of money for his celebrations due to the global financial crisis.

     His Christmas habit is affecting more than just his wallet. Mr. Park was previously warned by his doctor

that his Christmas addiction could kill him. His habit has caused his weight to 121kg.

     So how did Andy Park's strong desire for Christmas begin?

     "I'll never forget the day it started," said Mr. Park. "The sun was shining, but I was just feeling fed up and

bored, so I went home and put the decorations up. Suddenly I was happy. I thought, this is fun. So I did it

again the next day, and the day after that."

1. What's the best title for this text?

A. Mr. Christmas

B. Habit and weight

C. Christmas celebrations

D. A strong desire for Christmas

2. Which of the following underlined words in the text has the closest meaning to "eat"?

A. unwrap.

B. munch.

C. claim.

D. estimate.

3. What problem does Mr. Christmas now have?

A. His festive love costs him 150 pounds a week.

B. He doesn't have enough money for Christmas.

C. He often feels fed up and bored with his celebrations.

D. His doctor warned him against celebrating Christmas.

4. We can learn from Mr. Christmas's habit that _____.

A. every coin has two sides

B. all roads lead to Rome

C. there is no smoke without fire

D. an early bird catches worms

简述行政职能体系的构成。

材料一

：美国总统奥巴马2009年9月11日决定，以低价倾销为由对从中国进口的所有小轿车和轻型卡车轮胎实施为期三年的惩罚性关税。即对从中国进口轮胎实施的惩罚性关税税率第一年为35%，第二年为30%，第三年为25%。美国是中国轮胎第一大出口国，惩罚性关税将对我国轮胎业打击巨大。

材料二

：2009年9月14日，中国商务部提出要与美国在世贸组织（WTO）框架下就轮胎特保争端展开磋商。按照世贸组织规则，中美双方将就该问题展开为期60天的磋商。如果磋商无法解决争端，中方有权要求世贸组织成立专家组，就争端展开调查并进行裁决。

结合材料完成下列探究活动

如果你还想了解与“中国输美轮胎特保案”有关的信息，可以通过哪些途径获取？