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{{B}}Underground Coal Fires a Looming
Catastrophe{{/B}} Coal burning deep underground in China, India and Indonesia is threatening the environment and human life, scientists have warned. These large-scale underground blazes cause the ground temperature to heat up and kill surroundings vegetation, produce greenhouse gases and can even ignite forest fires, a panel of scientists told the annual meeting of the American Association for the Advancement of Science in Denver. The resulting release of poisonous elements like arsenic and mercury can also pollute local water sources and soils, they warned. "Coal fires are a global catastrophe," said Associate Professor Glenn Stracher of East Georgia College in Swainsboro, USA. But surprisingly few people know about them. Coal can heat up on its own, and eventu A. Using remote sensing techniques. B. Controlling the release of carbon dioxide. C. Making the soil heat resistant. D. Cutting off the oxygen supply. [简答题]某公司预计的年度赊销收入为6000万元，信用条件是（2／10，1／20，n／60），其变动成本率为65％，资金成本率为8％，收账费用为70万元，坏账损失率为4％。预计占赊销额70％的客户会利用2％的现金折扣，占赊销额10％的客户利用1％的现金折扣。一年按360天计算。要求：计算平均收现期。
[单项选择]电缆敷没需直接埋地时，允许使用的电缆是（）。
A. 裸钢带铠装电缆 B. 铠装防腐电缆 C. 聚氯乙烯绝缘电缆 D. 交联聚乙烯绝缘电缆 [单选题]解冻库热源出口温度不得高于（ ）℃。
A.60 B.80 C.100 D.120 [单选题]活动隔墙推拉应无噪声，其检验方法正确的是。（）
A.观察检查 B.推拉检查 C.尺量检查 D.检查施工记录 [单选题]ONU PON口（CLASSC+）接受光功率范围于（ ）dbm.
A.-8~-28 B.-8~-27 C.-8~-32 D.-8~-24 [单选题]柱塞式压力继电器采用弹簧做弹性元件的优点是（）
A.工作可靠，寿命长 B.调压范围广 C.灵敏度高 D.复位迅速 [单选题]价值增殖过程是超过一定点而延长了的价值形成过程，这里的“一定点”是指
A.工人补偿劳动力价值所需要的时间 B.资本主义生产过程的起点 C.剩余劳动时间的起点 D.必要劳动时间的终点 [填空题] 提土斗应为软布袋或( )等轻型工具，吊运土不得满装，防提升掉落伤人。
[简答题]Moreover, the Coleman report found that the gap between black and white children’s achievement scores appeared as early as the first grade and--even more surprising in roughly equal settings--this gap became even larger the longer the children were in school. Later researchers found more and more evidence that school tend to increase rather than reduce inequalities of class and race.
[单项选择]Bob and Annie had not known each other long before they became eager to get married: Bob because he wanted Annie and she ( though she was fond of Bob in her own way) because she could at least lead a life away from her family. When Mrs. Thompson suggested that they marry and live with her in Dover Street until they could get a house of their own, Annie hesitated. Her idea of marriage had been something which brought her a husband and an orderly, well-furnished home all at once. But she soon saw the advantages of this arrangement. She would, first of all, escape from her present life into a house which was quiet and efficiently run, not like her own; and she would be able to go on working so that she and Bob could save up all money more quickly for their own house. She would also get Bob, a good enough husband for any working-class girl: good-natured and ready to be bent to her way whenever it was necessary for her ends.
Things went well until her mother-in-law’ s death, when Annie A. too good for her B. poor, only good for any working-class girl C. kind and easy-going D. good at saving [单选题]高压验电前，验电器应先在有电设备上试验，确证验电器良好；无法在有电设备上试验时，可用（ ）高压发生器等确证验电器良好。
A.工频 B.高频 C.中频 D.低频 [单选题]公司长期用工发生特别严重违章的主要责任人每次记（ ）分，罚款3000元；严重违章每次记（ ）分，罚款1000元；一般违章每次记（ ）分，罚款100元。
A.2；1；0.2 B.2；1；0.5 C.4；2；0.2 D.4；2；0.5 [简答题]试简析通报文种的历史渊源、类型和各自用途。
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