{{B}}Egypt Felled by
Famine{{/B}} Even ancient Egypt’s mighty pyramid builders were powerless in the face of the famine that helped bring down their civilisation around 2180 BC. Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometres to the south was ultimately to blame--and the same or worse could happen today. The ancient Egyptians depended on the Nile’s annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have diminished these floods. Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablise the soil. When rain did fall it would have washed large mounts of soil into the Blue Nile and into Egypt, along with sediment from the A. The White Nile is the trunk of the River Nile. B. The White Nile is the trunk of the Blue Nile. C. The White Nile is a branch of the Blue Nile. D. The White Nile and the Blue Nile are branches of the River Nile. [单选题]作业人员应具备必要的( ),学会紧急救护法,特别要学会触电急救。
A.A-理论知识 B.B-实践经验 C.C-安全生产知识 D.D-生产知识 [单项选择]对中、长期内处于不同职务或工作类型的人员分布情况的规划是( )。
A. 晋升规划 B. 补充规划 C. 培训开发规划 D. 配备规划 [多选题]玉,石之美者有五德,以下属于玉之“五德”的是( )。
A.仁 B.义 C.智 D.洁 [单选题]桩基础施工遇到两段钢筋笼连接时,应采用焊接,双面施焊,接头数按( )错开。
A.0.2 B.0.3 C.0.4 D.0.5 [单项选择]某研究者为了验证氯霉素对伤寒的疗效,在408例伤寒患者中进行对照实验,其中251例用氯霉素治疗,其余157例不用。结果使用组251人中死亡20人,病死率7.07%;未用组157人中死亡36人,病死率22.8%。在临床医学研究中,对受试者应该做到的是()
A. 以科学利益放在第一位,患者利益放在第二位 B. 危重患者和病情发展变化快的患者不应被使用安慰剂 C. 在医学研究中,即使患者病情恶化也不可以中断实验 D. 为了更好地获得实验数据,可以对患者说慌,可以不解答患者的疑问 E. 在医学研究中,不必一味坚持知情同意 [单项选择]PICC插管最常选择的血管是()
A. 贵要静脉 B. 正中静脉 C. 头静脉 D. 腋静脉 E. 颈静脉 [判断题]高速铁路无砟轨道超高最大值不得超过175mm。
A.正确 B.错误 [判断题]批复的开头必须首先引述来文的标题并加文号,作为批复的依据。
A.正确 B.错误 [单项选择]具有假种皮的药材是()
A. 枳壳 B. 小茴香 C. 砂仁 D. 五味子 E. 槟榔 [单选题]当手持式验票机发生故障或送修时,采取()验票。
A.GATE B.TVM C.BOM D.不验票 [单选题]AC004 下列描述中错误的是( )。
A.系统误差是受某些恒定因素影响的 B.系统误差是可预知的 C.系统误差为一定值 D.系统误差是无法避免的 [单选题]230601018
RAP1.0 是指在 95%的概率下,在指定的飞行航迹上航空器必备的导航精度在 1km 以内。 A. T B. F [判断题]( )桥涵附近河道的淤土杂物必须清除。
A.正确 B.错误 我来回答: 提交
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