F氧化铝厂采用拜耳法生产氧化铝，生产工艺为：原料储运，石灰消化，原矿浆制备，高压溶出，赤泥沉降洗涤，分解与种子过滤，蒸发及排盐，氢氧化铝焙烧与包装等。原料、中间产品、产品主要有：铝土矿，石灰，液碱，燃煤，硫酸，柴油，硫酸铵，赤泥，氧化铝，灰渣，煤气，过热蒸汽，液氨，水等。该厂生产的主要工作由本厂负责，辅助性工作承包给G企业。F厂主办公楼有：2部电梯，1套消防系统，26个灭火器。F厂自备煤气站和热电站。煤气站生产氢氧化铝焙烧用煤气，煤气生产能力为65000N·m3/h。热电站有：3台130t/h燃煤锅炉，1套12MW汽轮发电机组，1套25MW汽轮发电机组。热电站生产270℃的蒸汽，生产能力为220t/h，蒸汽在管道中的压力为3.7MPa。F厂热力工程系统有：主厂房、堆煤场、燃煤破碎筛分输送系统、油泵房、除盐水站、点火泵房、灰渣库、熔盐加热站、除灰系统、热力管网、氨法脱硫系统等单元。工艺间物料采用管道或机动车辆输送。2010年3月，F厂组织了安全检查，对发现的事故隐患分析表明，现场作业人员没有意识到的事故隐患占31%，查出的两个重大事故隐患Ⅰ、Ⅱ在2010年1月份检查时已经发现。重大事故隐患Ⅰ未整改的原因是F厂的甲车间认为是乙车间负责整改，乙车间认为应由甲车间负责整改；重大事故隐患Ⅱ未整改的原因是F厂认为应由G企业出整改资金，G企业认为应由F厂出整改资金。
根据以上场景，回答下列问题（共26分）：
1.指出F厂原料、中间产品、产品中的火灾爆炸物质并说明理由。
2.指出上述场景中的特种设备。
3.指出F厂热力工程系统中危险因素及其存在的单元。
4.确定重大事故隐患Ⅰ、Ⅱ的整改责任单位并说明理由。
5.针对安全检查发现的问题，提出整改措施。
Passage 1
Questions 11 and 12 are based on the passage you have just heard.
[听力原文] 11-12
All food chains begin with the sun, and all food chains become broken up if one of the links disappears.
All life depends on energy from sunlight. Only plants can use this energy directly. Their leaves are little factories that use sunlight to make food from water and things in the soil and air.
Plants in turn feed all other living things. Animals can only use the sun’s energy after. it has been changed into food by plants. Some animals feed directly on plants, others eat smaller animals. Meat-eating animals are only eating plants indirectly. What about human beings We are members of many food chains. We eat vegetables and fruit. We also eat meat and drink milk. This means the sun’s energy passes through plant to animal before it reaches us.
Nature is a great thing. Any food chain always produces enough for each of its members if
A. Breaking up.
B. Dying out.
C. Stopping.
D. Disappearing.
This large city does almost no manufacturing and very little wholesale trade. Yet without the important service (1) provides, business everywhere would quickly grind to a (2) . Chaos would reign in all other leading cities. As you have guessed, the "product" we are talking about is government, and the city is the (3) of the United States, Washington, D. C. One out of every two persons (4) in the city works for the federal government.
Washington has many (5) . It leads the nation in level of education achieved by its residents. More than fifteen percent of its adults have had four years or more of college. (6) scientists can be found here than in any other city. Since larger incomes are earned by (7) people, Washington has the highest median income of any city.
Information is the vital force of the city. The Library of Congress (8) the largest and most comprehensive warehouse of informa
A. looks
B. resembles
C. takes
D. assumes
数据库系统由数据库、 (49) 和硬件等组成，数据库系统是在 (50) 的基础上发展起来的。
数据库系统由于能减少数据冗余，提高数据独立性，并集中检查 (51) ，由此获得广泛的应用。数据库提供给用户的接口是 (52) ，它具有数据定义、数据操作和数据检查功能，可独立使用，也可以嵌入宿主语言使用。 (53) 语言已被国际标准化组织采纳为标准的关系数据语言。
氧疗时,给氧浓度和氧流量是( )
29%,2L/min
35%,3L/min
45%,4L/min
40%,5L/min
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