《死海不死》一文写道：将奴隶和俘虏仍进了海里，屡淹不死．以下说法正确的是（ ）

读“中国部分地区沿42°N纬线地形剖面图”，完成下列问题。

（1）在下列植被类型后面填上相应的字母。

草原地带____________，森林草原地带____________，半荒漠地带____________，荒漠地带____________。

（2）图中自西向东，生产力水平的变化规律是________________________，载畜量的变化规律是________________________。

（3）在草原荒漠化中，起决定性作用的是____________，影响荒漠化进程的自然原因是____________，特别是____________的变化。

（4）近年来，尤其是华北地区一带经常出现沙尘天气（浮沉、扬尘、沙尘暴），就是____________的一种表现。这给华北地区的__________________________________带来非常不利的影响。

（5）我国____________、____________和华北一带冬春季节，常遭风沙危害，____________风将沙尘吹向东部和东南部，该地区的_____________是沙尘的主要来源。

（6）沙尘暴是环境恶化的征兆，它既是一种____________灾害，也是一种____________灾害。这种天气属____________天气系统。

（7）我国沙尘暴频繁的主要原因，从自然因素看，是因为____________________________；从人为因素看是由于____________________________________________________________。

（8）治理风沙，减轻灾害的最有效的途径是_______________________________________。

阅读理解。

     Xiangzi - Lucky, in English - is appropriately named. His owner Qiu Hong, a sports marketer,lets the

dog enjoy two daily walks,a collection of imported American toys, $300 worth of monthly food and

treats and his own sofa in her high-rise apartment. When Ms. Qiu feels bored, she takes Xiangzi out for a

long run in her car.

     In a sense, Xiangzi is not just a dog, but a social phenomenon - and, perhaps, a marker of how quickly the Chinese nation is booming through its transformation from poor farmer to first-world citizen.Twenty

years ago,there were hardly any dogs in Beijing, but now there're 900,000 registered dogs with countless

thousands of others unlicensed. How this came to be is, in some ways, the story of modern China as well.

"People used to be focused on improving their own lives, and they weren't really acquainted with raising

dogs," said Ms. Qiu. "But with the improvement in the economy, people's outlooks (观念) have

changed." 

     Having a dog can be a way to relieve the stress in people's lives, but mostly Beijing dogs have, as in

the West, become objects of affection - even devotion - by their owners. It's easy to find dog-treat stores, dog Web sites, dog social networks, dog swimming pools - even, for a time recently, a bring-your-dog

cinema and a bring-your-dog bar on Beijing's downtown nightclub row.

     The doglike devotion of pet owners here seems to have softened the city government heart. In 1994,

Beijing officials relaxed their no-dog policy to "severely restrict" dogs. In 2003,it was changed again to

allow anyone to own a dog, but to limit city dogs to no more than 35 centimeters in height. And nowadays the restriction seems to be loosely carried out.

     As for sti-fried Pekingese (京叭狗) - well, that dog,too, may have seen its day. A formal suggestion

to ban the eating of dogs has been made by a law professor named Chang Jiwen, who considered himself "not so much a dog lover as a China lover". "With China developing so quickly, more people should know how to treat animals properly," he said in 3 telephone interview.

1. What's the main idea of the first paragraph?

A. Xiang Zi is a clever dog.

B. Xiangzi lives a happy life.

C. Qiu Hong has a lot of money.

D. Qiu Hong is very busy.

2.  Paragraph Four mainly shows that Beijingers_____.

A. Iive under too much pressure

B. Love dogs evry much

C. are good at making money

D. have modernized their city

3. Judging from the article,we can know that______.

A. Pet owners can be as devoted as the dog

B. there were no dogs in Beijing before 2003

C. Beijing strictly bans dogs above 35cm high in practice

D. Chang Jiwen spoke for dog lovers only

4.Which is NOT mentioned in the article?

A. China's economical development.

B. The psychological problems in modern society.

C. People's attitude to wards animals.

D .The problems caused by dog keeping.

5.Which can be the best title of the article?

A. Chinese Dogs Are Lucky

B. Dogs Help Humans Live Better

C. Dogs Reflect China's Rise

D. Dogs Enjoy More Freedom In Beijing

下列哪项符合心房颤动的临床表现（）。

A.心率快，规整

B.心率慢，不规整

C.心率快，节律完全不整

D.心率慢，规整

E.心率慢，节律完全不整

虚拟页式存储管理中，页表的作用十分重要。在页表中指示页面是在内存还是在外存的页表表项是

A．驻留位

B．内存块号

C．访问位

D．保护位

某厂有机械加工车间、喷漆车间、锅炉房以及厂内油库等。机械加工车间有加工机械8台(套)，额定起重量3.0t的升降机2台、提升高度2m的起重机1台和叉车4台。喷漆车间有：调漆室、喷漆室、油漆临时储藏室、人员休息室等。锅炉房有2台出口水压0.4MPa(表压)、额定出水温度149℃、额定功率28Mw的锅炉。厂内油库有3t的汽油储罐1个及其配套的加油设备。2009年9月16日早上8点15分，机械加工车间起重工刘某做好了起吊准备，在其他人未到场的情况下开始了吊装作业。8点50分，李某进入机械加工车间，未走行人通道进入吊装作业区，被起吊的钢件撞成重伤，刘某慌忙停止吊装。
根据以上场景，回答下列问题：
1.上述案例中可能发生爆炸的设备或场所有哪些并说明所发生爆炸的性质。