| Dalton wondered why the heavier and
lighter gases in the atmosphere did not separate as oil and water do. He finally
concluded that the constituent (61) must exist in the form of
tiny particles or atoms and that these (62) be completely
mixed together in the atmosphere. This threw a new light in (63)
law of definite proportions. It was only necessary to suppose that the atoms
(64) combine into small groups of uniform (65)
and so form more complex substance; (66) the
mystery of this law was (67) . Dalton suggested, for
example, that carbon monoxide (68) formed by the one with
one (69) of atoms of carbon and oxygen, (70)
carbon dioxide results from a single (71) of
carbon uniting with two atoms of oxygen. Assuming this to be true,
(72) the definite p A. must B. been C. were D. is [单选题]1 号灭火瓶的灭火剂被释放到前货舱(后货舱/散装货舱)大约释放 秒；
A.120； B.60； C.10 [判断题]补充道砟,整修线路,恢复、安装轨道加强设备是钢轨大修主要内容。
A.正确 B.错误 [单选题]国家秘密的保密期限,除另有规定外,秘密级不超过( )。
A.十年 B.十五年 C.二十年 D. 三十年 [不定项选择题]共用题干
Eating Potatoes Gives Your Immune System a Boost
Eating potatoes is not only good for bowel health,but also for the whole immune system,especially when they come in the form of a potato salad or eaten cold.In a study on an animal model,researchers in Spain found that pigs fed large quantities of raw potato starch(RPS)not only had a healthier bowel,but also decreased levels of white blood cells,such as leucocytes and lymphocytes in their blood .White blood cells are produced as a result of inflammation or disease, generally when the body is challenged. The general down-regulation of leucocytes observed by the Spanish researchers suggests an overali beneficial effect,a generally more healthy body.The reduction in leucocyte levels was about 15 percent. Lower lymphocyte levels are also indicative of reduced levels of inflammation, but the observed reduction in both lymphocyte density and lymphocyte apoptosis is surprising. In what was the longest study of its kind,pigs were fed RPS over 14 weeks to find out the effect of starch on bowel health."The use of raw potato starch in this experiment is designed to simulate the effects of a diet high in resistant starch,"said study leader Jose Francisco Perez at the Universitat Autonoma de Barcelona,Spain. Humans do not eat raw potatoes,but they do eat a lot of foods that contain resistant starch, such as cold boiled potatoes,legumes,grains,green bananas,pasta and cereals.About 1 0 percent of the starch eaten by human is resistant starch-starch that is not digested in the small intestine and so is shunted into the large intestine where it ferments .Starch consumption is thought to reduce the risk of large bowel cancer and may also have an effect on irritable bowel syndrome (IBS). Immunology expert Lena Ohman's team previously found that the overall lymphocyte levels do not vary for IBS patients,but that lymphocytes are transferred from the peripheral blood to the gut,which support the hypothesis of IBS being at least partially an inflammatory disorder. She says the decrease in lymphocytes observed by the Spanish is therefore interesting,and a diet of resistant starch may be worth trying in lBS patients.Ohman is currently at the Department of Internal Medicine,Goteborg University,Sweden.The study is published in the journal Chemistry and Industry,the magazine of the SCI. For what a purpose did the researchers use raw potato starch in their experiment? A.They warned to observe how the leucocyte levels reduced in the experimental pigs. B.They wanted to simulate the effects of a diet high in resistant starch. C.They wanted to see how much potato an experimental pig ate every day. D.They wanted to see how much body weight each experimental pig gained in the end. [单选题]焦炉烟道气调湿机在正常生产过程中，为防止干燥床排气凝露，控制其温度不应低于（ ）。
A.100℃ B.65℃ C.40℃ D.3℃ [单选题]持续改进与不断地解决问题是培育（）的最佳路径。
A.制度 B.文化 C.人员 D.标准 [单项选择]
The Evolutionary Future of Biodiversity Now we are altering the planet more rapidly and profoundly than ever, and much of the diversity produced by half a billion years of evolution could be lost in the next few centuries. We are triggering a mass extinction that could be as severe as the one that ended the reign of the dinosaurs. Given enough time, biodiversity will recover. Extinctions create new evolutionary opportunities for the survivors: the blossoming of mammals after the dinosaurs died out ultimately led to our evolution, after all. But the aftermath of this Anthropocene ( 地质史上的新时期，称为“人类世”) extinction will not be like any other. Humans have become the main driving force in evolution--and life will never be the same again. The list of threats we pose to biodiversity is long. We are killing many creatures directly, destroying habitats, introducing exotic predators and diseases, and pumping out pollution. Already, a tenth o A. the variation of genes in wild animals B. the extinction of all large animals C. the migration of some wild animals D. the changes of genes in wide animals [单项选择]SCID的主要表现是( )
A. 细胞免疫缺陷 B. 体液免疫缺陷 C. 吞噬细胞缺陷 D. 补体缺陷 E. 体液和细胞免疫均缺陷 [单选题]隧道感染是几级?()
A..1级 B.2级 C.3级 D.4级 E..5级 [单项选择]以下各项中，( )是对报关企业行为规范的正确表述。
A. 报关企业应在海关规定的业务范围内进行报关活动 B. 报关企业所属报关员的报关行为所引起的法律和经济责任由报关员自行承担 C. 报关企业禁止开展异地报关业务 D. 报关企业可以接受任何企业、单位的委托办理报关纳税事宜 [单项选择]在我国国防法律体系中具有统帅地位、是国防法规的核心和其他军事立法的依据的是哪部法律？（）
A. 《中华人民共和国国防法》 B. 《中华人民共和国国防教育法》 C. 《中华人民共和国兵役法》 D. 《中华人民共和国军事设施保护法》 [单项选择]图根导线的主要技术要求中，一级图根导线的导线全长相对闭合差和坐标闭合差分别为（）。
A. 1/5000和0.22m B. 1/3000和0.22m C. 1/2000和0.12m D. 1/5000和0.12m [单项选择]下列用品中，（）不属于一般安全用具。
A. 手套 B. 安全带 C. 护目眼镜 D. 标示牌 [判断题]当牵引变电所单电源供电时，供电调度应通知供电段做好应急越区准备。（应知应会）（ ）
A.正确 B.错误 [单项选择]己内酰胺装置蒸馏加热蒸气用（）。
A. 高压蒸气 B. 中高压蒸气 C. 中压蒸气 D. 低压蒸气 [判断题]行政处罚决定依法作出后,当事人应当在行政处罚决定的期限内,予以履行。( )
A.正确 B.错误 [单项选择]在民间有“小人参”之誉的是（）。
A. 胡萝卜 B. 茄子 C. 苦瓜 D. 南瓜 [判断题]各等级作业风险应提前编制管控措施，结合现场勘查情况编制“施工方案 ”，相关内容应按照公司要求严格执行。四级和五级风险还应编制专项管控方案，主要内容应包含作业概况、 停电范围、作业内容、组织措施、技术措施、安全措施、应急处置措施等
A.正确 B.错误 [判断题]党委在对某党员嫖娼问题研究时提出，该党员平时积极配合党委工作，并被评为市级先进工作者，应当从轻处分，决定向市纪委请示时建议给予其留党察看一年的处分。
A.正确 B.错误 [单项选择]结构化程序设计主要强调的是( )。
A. 程序的规模 B. 程序的效率 C. 程序设计语言的先进性 D. 程序的易读性 [单选题]电子式互感器应能真实地反映一次电流或电压，额定延时时间不大于2ms、唤醒时间为（）。
A.1 B.0 C.2 D.3 [单项选择]Questions 23 to 25 are based on the conversation you have just heard.
A. Online business. B. Some new products. C. Cable modems. D. A new high-speed network. [判断题]( ) 单开道岔上存在的有害空间是限制列车、机车车辆过岔速度的一个重要因素。
A.正确 B.错误 [单项选择]霍乱的典型表现是（）
A. 黏液脓血便 B. 四肢抽搐，顽固性呕吐 C. 皮肤黏膜出血点 D. 发热，盗汗 E. 腹泻，呕吐 [单项选择]贫血是指外周血单位体积中（）
A. 红细胞计数低于正常 B. 红细胞计数和血红蛋白浓度低于正常 C. 红细胞比容低于正常 D. 红细胞计数、血红蛋白浓度及红细胞比容低于正常 E. 循环血容量不足 [单项选择]立式冷柜专门存放香槟和白葡萄酒，其全部材料是木制的，里面分成横竖成行的格子，香槟和白葡萄酒横向插入格子存放，温度保持在（）。
A. 2~4°C B. 4~8°C C. 8~12°C D. 12~16°C [单项选择]如果人员或财产遭受损失的可能性超过可接受状态，即是（）
A. 安全 B. 不安全 C. 和谐 D. 不和谐 [单选题]导致列管式换热器传热效率下降的原因可能是( )
A.列管结垢或堵塞 B.不凝气或冷凝液增多 C.道或阀门堵塞 D.以上三种情况 [判断题]参加工程施工质量验收的各方人员必须具备规定的资格( )
A.正确 B.错误 [简答题]建筑企业的材料管理机构的主要职责有哪些？
[单选题]我厂3号、4号带式输送机输煤量( )。
A.1500t/h； B.1000t/h； C.1700t/h； D.1200t/h。 [单选题] 由于空气的重力作用在地面或者物体表面上,产生的压力称为()。
A.大气压 B.绝压 C.表压 [单项选择]2008年5月12日14时28分，四川省发生里氏8级强烈地震，震中位于阿坝州汶川县，地震造成了重大的生命和财产损失。震级表示地震本身大小的等级划分。它与地震释放出来的能量大小有关。而地震烈度是指地震对地表和建筑物等破坏强弱的程度。下列说法中，错误的是：
A. 一次地震只有一个震级。 B. “里氏8级”指的是地震震级。 C. 一般地说，离震中越近，地震震级越大。 D. 同一次地震中，在不同地区的地震烈度可能不同。 我来回答: 提交
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