Egypt Felled by Famine Even ancient Egypts mighty pyramid builders were powerless in the face of the famine that helped bring down their civilian around 2180 BC. Now evidence gleaned(搜集) from mud deposited by the River Nile suggests that a shift in climate thousands of kilometers to the south was ultimately to blem — and the same or worse could happen today. The ancient Egyptians depended on the Niles annual floods to irrigate their crops. But any change in climate that pushed the African monsoons(季风) southwards out of Ethiopia would have diminished these floods. Dwindling(逐渐变少;使变小) rains in the Ethiopian highlands would have meant fewer plants to establish the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile and into Egypt, along with 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. [单项选择]A. He’ll be able to clean the house in time. B. He doesn’t have time to take the woman home.
C. It should be easy for the guests to find the house. D. He needs time to relax before the guests arrive. [单项选择]"Won't you tell me more about your problem"
"I ______ talk about it any more." [简答题]三碱基重复会引发哪些人来的遗传病?
[单选题]工作负责人(监护人)应是具有相关工作经验,熟悉设备情况和本规程,经( )批准的人员。
A. 设备运维班组 B.工区(车间) C.工区(车间) D. 本单位总工程师 [多选题]带式输送机胶带阻燃和抗静电性能符合规定,有( )等保护装置,装设温度、烟雾监测装置和自动洒水装置。
A. 巷道平面布置图 B. 防跑偏 C. 防堆煤 D. 防撕裂 [填空题]交叉板出现PS告警意味着出现msp保护倒换,支路板出现PS告警意味着出现( )保护倒换
[判断题] 轨检车检查轨距正负偏差在图纸上反映:实际轨距大于标准轨距时轨距偏差为正,反之为负。
A.正确 B.错误 [单选题]商品的价值量是由( )
A.剩余劳动时间决定的 B.必要劳动时间决定的 C.社会必要劳动时间决定的 D.个别劳动时间决定的 [多选题]必须坚持以人民为中心的工作导向,( )、展形象,牢牢掌握意识形态工作领导权,建设具有强大凝聚力和引领力的社会主义意识形态。
A.举旗帜 B.聚民心 C.育新人 D.兴文化 [判断题]公告栏和告知卡应使用坚固材料制成,尺寸大小应满足内容需要,高度应适合劳动者阅读,内容应字迹清楚、颜色醒目。()
A.正确 B.错误 [简答题]计算题:电动机电流单相及三相计算公式:单相I=P*1000/220*功率因数*效率三相I=P*1000/1.73*380*功率因数*效率有台20Kw电动机电源电压380伏,功率因数0.8,效率100%。求该电动机电流是多少?
[多选题]以下哪些是属于中级人民法院管辖的第一审刑事案件。( )
A.危害国家安全活动案件 B.恐怖活动案件 C.可能被判处无期徒刑的案件 D.可能被判处死刑的案件 [判断题]桥梁用球型支座水平承载力试验,应将支座竖向加载至设计承载力后施加水平荷载。( )
A.正确 B.错误 [单选题]4.172. 第172题
具备条件的设备可进行( )操作,即应用可编程计算机进行的自动化操作。 A.就地 B.远方 C.程序 D.遥控 [单选题]( )消防车主要装备曲臂或直曲臂,臂架顶端设有破拆装置,以高空破拆为主要功能的举高消防车。(易)
A.登高平台 B.举高喷射 C.云梯 D.举高破拆 [单选题]低压居民客户不具备直接装表条件的,现场勘查时答复供电方案,由勘查人员同步提供设计简图和施工要求,根据与客户约定时间或电网配套工程竣工( )装表接电。
A.5个工作日 B.3个工作日 C.2个工作日 D.当日 我来回答: 提交
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