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某储运公司仓储区占地300 m×300 m,共有8个库房,原用于存放一般货物。3年前,该储运公司未经任何技术改造和审批,擅自将1号、4号和6号库房改存危险化学品。2008年3月14日12时18分,仓储区4号库房内首先发生爆炸,12分钟后,6号库房也发生了爆炸,爆炸引发了火灾,火势越来越大,之后相继发生了几次小规模爆炸。消防队到达现场后,发现消火栓不出水,消防蓄水池没水,随后在1公里外找到取水点,并立即展开灭火抢险救援行动。事故发生前,1号库房存放双氧水5 t;4号库房存放硫化钠10 t、过硫酸铵40 t、高锰酸钾10 t、硝酸铵130 t、洗衣粉50 t;6号库房存放硫磺15 t、甲苯4 t、甲酸乙酯10 t。事故导致15人死亡、36人重伤、近万人疏散,烧损、炸毁建筑物39000 m2和大量化学物品等,直接经济损失1.2亿元。 根据以上场景,回答下列问题(1~3题为单选题,4~7题为多选题) 甲苯挥发蒸气爆炸的基本要素包括( )。

A. 甲苯蒸气与空气混合浓度达到爆炸极限
B. 环境相对湿度超过50%
C. 开放空间
D. 点火源
E. 受限空间

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Directions: Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on Answer Sheet 1. The amount of sunlight reaching Earth’s surface appears to be growing. The phenomenon, which some dub "global brightening," (1) scientists with a puzzle. If the (2) is real and global, how long will it last and what are the consequences for climate change, the planet’s water cycle, and other (3) that draw energy from sunlight (4) , the answer might seem obvious: More sunlight reaching the ground in a warming world means that temperatures will get warmer (5) . Not so fast, some researchers say. Additional warming would be certain (6) nothing else in the climate system changes. And the climate system is (7) static. Some combinations of changes could reinforce the heating; others could (8) it. Unraveling these interactions and forecasting their course require an accurate accounting of the sunlight reaching the surface and the (9) the surface sends skyward. Moreover, researchers say, measurements of the sun’s strength at Earth’s surface are potentially powerful tools for (10) human influences on the climate. Earth’s radiation "budget" (11) an "extremely important parameter that is (12) known,’ says Robert Charlson, an atmospheric scientist at the University of Washington at Seattle. "It needs to be (13) much better than it is." (14) about the amount of sunlight reaching Earth’s surface were first raised in 1974. Researchers from the United States and Israel recorded a 12% drop (15) sunlight over 40 years at a (16) station in the southern Sinai Peninsula. Since then, others have used a variety of techniques to try to track (17) sunlight. Three years ago, for example, a (18) led by Beate Liepert at Columbia University’s Lamont-Doherty Earth Observatory gathered data from ground (19) around the world and found that solar radiation reaching the surface fell (20) 4% from 1961 to 1990.

A. monitoring
B. observing
C. measuring
D. recording

(2)结合材料1、2、3分析目前中日关系的现状以及如何正确处理中日关系。

Text 3 The "MyDoom" virus could presage a generation of computer attacks by organised gangs aiming to extract ransoms from online businesses, experts said yesterday. The warning came as the website run by SCO, a company that sells Unix computer software, in effect disappeared from the web under a blizzard of automated attacks from PCs infected by the virus, which first appeared a week ago. The "MyDoom-A" version of the virus is reckoned to be the worst to have hit the internet, in terms of the speed of its spread, with millions of PCs worldwide believed to be infected. Such "zombie" machines begin to send out hundreds of copies of the virus every hour to almost any e-mail address in their files. On Sunday they began sending automated queries to SCO’s website, an attack that will continue until 12 February. The attack is the web equivalent of ringing the company’s doorbell and running away a million times a second, leaving its computers unable to deal with standard requests to view its pages. "You have to wonder about the time limit," said Graham Cluley, senior technology consultant at the antivirus company Sophos. "Someone could go to SCO after the 12th and say, ’If you don’t want this to happen again, here are our demands’." Raimund Genes, European president of the security software firm Trend Micro, said: "Such a programme could take out any major website on the internet. It’s not terrorism, but it is somebody who is obviously upset with SCO" SCO has earned the enmity of computer users through a lawsuit it has filed against IBM. SCO claims ownership of computer code it says IBM put into the free operating system Linux, and is demanding licence fees and damages of $1bn. Mr. Cluley said: "It might be that whoever is behind this will say to SCO, ’if you don’t want the next one to target you, drop the lawsuit’." SCO has offered $250,000 (£140,000) for information leading to the arrest of the person or people who wrote and distributed MyDoom. Nell Barrett, of the security company Information Risk Management, said, "I would give a lot of credence to the idea of gangs using viruses to extort money. It’s hard for law enforcement to track them down, because they’re using machines owned by innocent people." A second variant of MyDoom will start attacking part of Microsoft’s website later today. The antivirus company MessageLabs said it had blocked more than 16 million copies of the virus in transit over the net so far. But millions more will have reached their targets. Neil Barrett’s remarks are quoted to show ______.

A. experts’ different understandings of intention of the attack
B. the difficulty to find out the gangs behind this act
C. people’s doubt about winning the lawsuit against sca
D. the problem with the security of information management

Directions: Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on Answer Sheet 1. The amount of sunlight reaching Earth’s surface appears to be growing. The phenomenon, which some dub "global brightening," (1) scientists with a puzzle. If the (2) is real and global, how long will it last and what are the consequences for climate change, the planet’s water cycle, and other (3) that draw energy from sunlight (4) , the answer might seem obvious: More sunlight reaching the ground in a warming world means that temperatures will get warmer (5) . Not so fast, some researchers say. Additional warming would be certain (6) nothing else in the climate system changes. And the climate system is (7) static. Some combinations of changes could reinforce the heating; others could (8) it. Unraveling these interactions and forecasting their course require an accurate accounting of the sunlight reaching the surface and the (9) the surface sends skyward. Moreover, researchers say, measurements of the sun’s strength at Earth’s surface are potentially powerful tools for (10) human influences on the climate. Earth’s radiation "budget" (11) an "extremely important parameter that is (12) known,’ says Robert Charlson, an atmospheric scientist at the University of Washington at Seattle. "It needs to be (13) much better than it is." (14) about the amount of sunlight reaching Earth’s surface were first raised in 1974. Researchers from the United States and Israel recorded a 12% drop (15) sunlight over 40 years at a (16) station in the southern Sinai Peninsula. Since then, others have used a variety of techniques to try to track (17) sunlight. Three years ago, for example, a (18) led by Beate Liepert at Columbia University’s Lamont-Doherty Earth Observatory gathered data from ground (19) around the world and found that solar radiation reaching the surface fell (20) 4% from 1961 to 1990.

A. rarely
B. badly
C. actually
D. poorly

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