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{{B}} Egypt Felled by Famine{{/B}} 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 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 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 amounts of soil into the Blue Nile and into Egypt, along with sedim A. immediately after a period of drought. B. immediately after a period of flood. C. just before a drought struck. D. just before a flood struck. [判断题]连接电动机械及电动工具的电气回路应单独设开关或插座,并装设剩余电流动作保护装置,金属外壳应接地电动工具应做到“一机一闸一保护”。
A.正确 B.错误 [多选题]进入模拟（）环境中的人员，必须佩戴空气呼吸器，做好个人防护并严格执行操作规程。
A.有毒气体 B.高温 C.浓烟 D.倒塌 [单项选择]下列哪项是确诊肝硬化最可靠的证据
A. 食管钡餐检查发现静脉曲张 B. 腹壁有水母头状静脉怒张 C. 肝穿刺活检示假小叶形成 D. 血浆白蛋白／球蛋白比例倒置 E. 血清单胺氧化酶活性增高 [单选题]《公安消防部队执勤条令（试行）》规定，交接班时听到出动信号，由( )负责出动。
A.接班人员 B.交班人员 C.全体人员 D.交接班商定人员 [单选题]对以空气柱震动引发的空气动力性噪声的治理，一般采用( )措施。
A.安装隔声窗 B.安装隔声屏障 C.加装减震垫 D.安装消声器 [判断题]民警在收到匿名爆炸威胁时，无论消息是否真实，都应该宁可信其有，进行快速反应。
A.正确 B.错误 [单项选择]中医医疗机构从事中医医疗活动，应按规定办理审批手续，取得( )
A. 医疗机构开业证明 B. 医疗机构营业执照 C. 医疗机构规划证 D. 医疗机构执业许可证 E. 医疗机构制剂许可证 [单选题]节假日期间及办公时间以外的A、C1类临时补修计划向（）申报；
A.车场调度 B. 电力调度 C. OCC值班主任 D. 维修调度 我来回答: 提交
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