Amphibious vehicles, those that can
move on both land and water, have been in use for a number of years, but while
most of them were fairly fast on land, they moved quite slowly when they were
functioning as boats. The only truly amphibious vehicle that can move with equal
ease on both land and water is the hovercraft (气垫船). The hovercraft is the
invention of an electronics engineer named Christopher Cockerell. Cockerell’s
hobby was sailing and he was interested in the problem of reducing the friction
of water on the body of a boat, and hit on the idea of designing a boat which
would travel on a cushion of air. The air cushion under a hovercraft is produced by a large fan which blows air downwards between the craft and the water or ground, and so lifts up the craft. The air is main-rained at higher than atmospheric pressure b A. the sidewall ACV B. Mountbatten Class hovercraft C. Cockerell’s ACV D. Sedam N500 [单项选择]可用于盖髓、深龋保髓治疗的材料是()
A. 磷酸锌水门汀 B. 聚羧酸锌水门汀 C. 玻璃离子水门汀 D. 氢氧化钙水门汀 E. 氧化锌丁香酚水门汀 [单项选择]We were late as usual. My husband had insisted on watering the flowers in the garden by himself, and when he discovered that he couldn’t manage, he asked me for help at the last moment. So now we had an hour to get to the airport. Luckily, there were not many cars or buses on the road and we were able to get there just in time. We checked in and went straight to a big hall to wait for flight to be called. We waited and waited, but no announcement was made. We asked for information and the girl there told us that the plane hadn’t even arrived yet. In tile end, there was another announcement telling us that passengers waiting for Flight LJ108 could get a free meal voucher(凭单) and that the plane hadn’t left Spain for technical problems. We thought that meant that it wasn’t safe for the plane to fly. We waited again for a long time until late evening when we were asked to report again. This time we were given vouchers to spend the night in a nearby hotel.
The next morning after a bad A. the girl to give them information B. their flight to be announced C. the free meal voucher D. other passengers to arrive [单项选择]男性,76岁。因"左侧肢体无力2天"入院。既往有慢性心功能不全、高血压病史,现患者出现昏迷,需预防误吸。以下误吸的预防错误的是()
A. 半卧位 B. 及时清理分泌物 C. 最好行空肠营养 D. 最好行胃内营养 E. 加胃肠动力药 [单项选择]全身浮肿,下肢尤甚,小便短少,心悸目眩,畏寒肢冷,苔白脉沉滑,属于 ()
A. 脾阳虚衰 B. 水湿内停 C. 阴阳两虚 D. 肾虚水泛 E. 肾阴不足 [单选题]消防救援队伍和其他消防队伍共同执行灭火与应急救援任务时,由( )实施统一指挥。
A.公安机关 B.消防救援队伍 C.当地政府 D.相关机关 [填空题]活动目录的逻辑结构包括下列组件:对象,组织单元,(),(),()。
[单选题] 细碎机主轴轴承型号( )。
A.22230 B.23230CC/WW33 C.2007106 D.8114" [多项选择]所有权益的来源包括()。
A. 所有者投入的资本 B. 直接计入所有者权益的利得 C. 直接计入所有者权益的损失 D. 留存收益 [判断题]在飞行中,客舱发生火情, 即使火已扑灭,也应有人监控,防止复燃.
A.正确 B.错误 [单项选择]动物发生先兆性或习惯性流产时的正确处理方法是______。
A. 人工引产催产 B. 剖腹取胎 C. 注射黄体酮(孕酮)保胎 D. 牵引拉出胎儿 E. 注射抗生素防腐 [单选题]关于心室重构的概念,下列哪项不正确
A.心肌损害,心脏负荷过重,室壁应力增加,心室反应性肥大 B.肥厚心肌纤维缩短能力和心室排血能力下降 C.肥厚心肌收缩速度下降,松弛延缓 D.心肌适当肥厚足以克服室壁应力时,心功能可维持正常 E.早期心脏肥厚对维护心功能有益 [多选题]防止重整催化剂烧焦超温采取的措施有( )。
A.加大再生循环气量 B.降低循环气氧含量 C.降低催化剂再生循环速率 D.增大氮气量 [简答题]假定你是某食品监管部门的一名工作人员,请你就我国食品安全中存在的问题提出解决措施。
要求:条理清楚,所提措施具体、有针对性。不超过400字。 [单项选择]下列各项中,不属于票据债务人可以对任何持票人行使票据抗辩的情形是( )。
A. 票据未记载绝对必要记载事项 B. 票据未记载相对必要记载事项 C. 票据债务人的签章被伪造 D. 票据债务人为无行为能力人 [简答题]将考生文件夹下MIN.WPS文件设置成只读属性并取消存档属性。
[单选题]火力发电厂按( )分为,背压式电厂和凝汽式电厂。
A.压力 B.容量 C.排汽方式 D.消耗能源 [多选题]指示仪表首次检定包括哪些项目?()
A.外观检查和基本误差 B.升降变差、偏离零位 C.位置和功率因数影响 D.阻尼 E.绝缘电阻测量 F.介电强度试验 [不定项选择题]A.病理性赘述
A.持续言语 B.刻板言语 C.模仿言语 D.思维散漫 E.病人不断地重复某些简单的言语 [单选题]项目主管单位、属地单位和承包商应对()进行现场监督和审核。
A.作业人员 B.分包商 C.其他承包商 D.内部承包商 [单项选择]目前,在商业银行的全部资金来源中占最大比例的是( )。
A. 负债 B. 存款 C. 自有资本 D. 借款 [多选题]下列各项中,引起企业资产和所有者权益同时减少的经济业务有( )。
A.以盈余公积弥补以前年度亏损 B.宣告发放并支付现金股利 C.以资本公积转增资本 D.以现金资产回购本公司股票并注销 [判断题]自动闭塞区段连续式机车信号机显示一个双半黄色灯光时,表示列车接近的地面信号机开放经道岔直向位置的进路、显示两个黄色灯光或其他相应显示。( )
A.正确 B.错误 [单选题]测量线圈两端的两块圆柱形是( )
A.永久磁钢 B.半永久性磁钢 C.生铁 D.不锈钢 [多项选择]产业政策对推动产业结构优化升级,增强产业的国际竞争力,维持国家经济安全,促进经济协调发展等具有重要而积极的作用,其作用主要表现在( )等方面。
A. 有利于计划与市场、宏观管理与微观经济结合 B. 促进产业结构的优化升级 C. 增强产业的国际竞争力 D. 促进经济增长方式转变 E. 保障国家的财产安全 [单项选择]病人52岁,双眼戴-5.00D近视眼镜,矫正视力1.0,其用眼镜度数应为()。
A. +3.00D B. +2.00D C. -3.00D D. 不用戴眼镜 E. -2.OOD [多选题]贷款账户状态转非应计包含哪些情形?()
A.A. 贷款本金逾期超过90天 B.B. 贷款利息逾期超过90天 C.C. 贷款本金或利息逾期超过90天 D.D. 人工认定为非应计的其他情况 [单选题]诊治伤害现象的划分应不包括()
A.有意伤害 B.可知伤害 C.免责伤害 D.责任伤害 E.可控伤害 [多选题]深静脉穿刺置管位置可考虑( )
A. 颈内静脉 B. 锁骨下静脉 C. 股静脉 D. 腋静脉 [单项选择]患者家属加入医患关系中带来的负面效应是()
A. 加重了医务人员的责任 B. 增加了对医务人员的监督 C. 有时会损害患者正当权益 D. 出现了从属关系 E. 加大了社会意义 [多项选择]活字印刷术的工艺流程包还字括活字的()。
A. 制作 B. 拣字 C. 排版 D. 印刷 E. 拆版和还字 [单项选择]下述______不是数据仓库的基本特征。
A. 面向主题 B. 集成 C. 反映历史变化 D. 包括当前准确数据 [单选题](62179)压注高分子化学浆液,注浆嘴间距根据裂缝宽度来确定,裂缝宽度0.3~1mm,间距为( )。(1.0 分)
A.50~100mm B.100~150mm C.150~250mm D.250~400mm [单项选择]使用摇表测量绝缘时,必须验明被测设备无电压,确实证明设备()后,方可进行。
A. 状态正常 B. 标识清楚 C. 无人工作 我来回答: 提交
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