更多“发生有焰燃烧的一个必备条件是要有不受抑制的链式反应。”相关的问题
急性中毒的病因有（）
A.工业性毒物 B.农药 C.药物 D.有毒动、植物 E.以上都是
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（）需要在微碱性介质中进行预蒸馏分离。
A、挥发酚
B、氨氮
C、氰化物
D、氟化物
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Lichens. probably the hardiest of all plants, live where virtually nothing else can---not just on rugged mountain peaks but also on sunbaked desert rocks. They are usually the first life to appear on a mountainside that has been scraped bare by an avalanche. Unlike other members of the plant kingdom, lichens are actually a partnership between5 two plants. The framework of a lichen is usually a network of minute hairlike fungus that anchors the plant, The other component is an alga (similar to the green film of plant life that grows on stagnant pools) that is distributed throughout the fungus. Being green plants, algae are capable of photosynthesis--that is, using energy from the Sun to manufacture their own food. The fungi arc believed to supply water, minerals, and physical support to10 the partnership. Lichens are famous for their ability to survive ~ water shortage. When water is scarce (as is often the case on a mountain), lichens may become dormant and remain in that condition for prolonged periods of time. Some lichens can even grow where there is no rain at all, surviving on only occasional dew--the moisture that condenses on the surface15 of the plants at night, And unlike most other plants, lichens are little affected by the strong ultraviolet rays in the mountains. Lichens use little energy, for they grow slowly. Some grow so slowly and are so old that they are called "time stains." You may find lichens that are centuries old; certain of these lichen colonies have been established for an estimated 2,000 years.20 For decades, scientists wondered how the offspring of an alga and a fungus got together to form a new lichen, it seemed unlikely that they would just happen lo encounter one another. It was finally discovered that in many cases the two partners have never been separated. Stalklike "buds" that form on certain lichens are broken off by the wind or by animals; these toll or are blown to a new location
A．how the sun affects lichensB．why plants depend on waterC．where fungi become algaeD．what algae arc
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只在肝脏中合成的物质是（）
A.血浆蛋白 B.胆固醇 C.激素 D.尿素 E.脂肪酸
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WirelessMon软件可以进行空口抓包。
A . 正确
B . 错误
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常用化学保鲜技术有______。
A．食品防腐剂
B．食品抗氧化剂
C．果蜡涂膜
D．食用膜
E．纤维素膜
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以下（）是HLR的GT地址。
A.460030934821300
B.460030934821200
C.460036051000000
D.460030934822100
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【收入】下列各项中,属于工业企业营业收入的有( )。(2017年)
A. 债权投资的利息收入 B. 出租无形资产的租金收入 C. 销售产品取得的收入 D. 出售无形资产的净收益
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新公共服务理论认为要为公民服务，而不是为（）
A.市民服务B.农民服务C.人民服务D.顾客服务
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肾活检回报提示肾脏组织有明显的细胞浸润及间质水肿，浸润的细胞主要有嗜酸粒细胞等，肾小球和肾血管无明显病变，目前已经给予常规抗过敏药物辅以血液透析治疗1周，复查血Cr696μmol／L，此时，可谨慎试用()
A.甲泼尼龙冲击治疗 B.环磷酰胺冲击治疗 C.环孢素治疗 D.中医中药治疗 E.霉酚酸酯治疗 F.糖皮质激素序贯治疗0.5～1.0mg/（kg·D.
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根据下列条件，回答 93～97 题： 某企业正在对自己的生产系统人力资源供给进行预测，从四年来销售系统人力资源人员变动情况中得到一个矩阵表： 人员调动概率职位生产总监生产主管工人离职生产总监0.60.4生产主管0.20.70.1工人0.10.40.3第93题：该企业生产总监的内部供给量是（ ）人。A．5 B．6C．7 D．8
A.6B.4生产主管0.20.7C.1工人D.10.40.3第93题：该企业生产总监的内部供给量是（E.5F.6C．7G.8
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2010年《国际贸易术语解释通则》有关FCA贸易术语下交货与装货义务的规定包括下列哪些内容?
A . 当卖方在其所在地交货时，应由买方负责装货B . 当卖方在其所在地交货时，应由卖方负责装货C . 当卖方在其他地点交货时，则卖方应负责将货物运至交货地点并卸下才完成交货D . 当卖方在其他地点交货时，则当货物在卖方的运输工具上尚未卸货即完成交货
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巡回法庭由哪一级法院设立______
A.基层法院
B.中级法院
C.高级法院
D.最高法院
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以下不属于钳工工作任务的是（）
A.锉削
B.攻螺纹
C.钻孔
D.焊接
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