The biggest safety threat facing
airlines today may not be a terrorist with a gun, but the man with the portable
computer in business class. In the last 15 years, pilots have reported well over
100 incidents that could have been caused by electromagnetic interference. The
source of this interference remains unconfirmed, but increasingly, experts are
pointing the blame at portable electronic devices such as portable computers,
radio and cassette players and mobile telephones. RTCA, an organization which advises the aviation (航空) industry, has recommended that all airlines ban(禁止)such devices from being used during "critical" stages of flight particularly take- off and landing. Some experts have gone further, calling for a total ban during all flights. (76){{U}} Currently, rules on using these devices are left up to indi A. Because it remains a mystery what wavelengths are liable to be interfered with. B. Because it is extremely dangerous to conduct such research on an airplane. C. Because research scientists have not been able to produce the same effects in labs. D. Because experts lack adequate equipment to do such research. [判断题]Migration is usually defined as "permanent or semi-permanent change of residence". However our concern is with movement between nations, not with internal migration within nations, although such movements often exceed international movements in volume. Today, the motives of people who move short distances are very similar to those of international migrants.
Students of human migration speak of "push" and "pull" factors, which influence an individual’s decision to move from one place to another. Push factors are associated with the place of origin. A push factor can be as simple and mild a matter as difficulty in finding a suitable job, or as traumatic as war, or severe famine. Obviously, refugees who leave their homes with guns pointed at their heads are motivated almost entirely by push factors (although pull factors do influence their choice of destination). Pull factors are those associated with the place of destination. Most often these are economic, such as better job op [单项选择]产品出口销售额占其产品销售总额( )的限制类外商投资项目,经批准,可以视为允许类外商投资项目。
A. 50%以上 B. 70%以上 C. 90%以上 D. 100% [判断题]大多数金融时间序列的是平稳序列。( )
A.正确 B.错误 [简答题]我们通常所说的你今天尾巴是表示今天是你什么日子?
[单选题](46612)60kg/m钢轨无缝线路混凝土枕碎石道床,线路设备大修周期( )Mt。(1.0分)
A.300 B.450 C.600 D.700 [单选题]操作票应用黑色和蓝色的钢(水)笔或圆珠笔逐项填写。操作票票面上的时间、地点、线路名称、杆号(位置)、设备双重名称、动词等关键字。若有个别错、漏字需要修改、补充时,应使用规范的符号,字迹应清楚。
A.正确 B.错误 C./ D./ E./ F./ [单选题]下列关于资产的企业所得税税务处理,说法错误的是( )。
A.林木类生产性生物资产计算折旧的最低年限为10年 B.外购商誉的支出,在企业整体转让或者清算时,准予扣除 C.未足额提取折旧的固定资产的改建支出,可作为长期待摊费用,在规定的期间内平均摊销 D.租入固定资产的改建支出,按照合同约定的剩余租赁期限分期摊销 [单项选择]急性宫外孕的病人在进行妇科检查时不会出现的体征是()
A. 阴道后穹隆饱满有触痛 B. 宫颈有明显的牵拉痛 C. 宫颈外口松,开大,容一指 D. 子宫稍大稍软 E. 子宫有漂浮感 [判断题]旁路系统运行前进行耐压试验。
A.正确 B.错误 [判断题]YD02GG003458、小朱在装表接电工作前,应被告知作业现场和工作岗位存在的危险因素、防范措施及应急措施。()
A.正确 B.错误 [填空题]《智能变电站技术导则》规定,智能变电站辅助系统宜具备变电站设备运行温度、湿度等环境定时检测功能,实现空调、风机、加热器的远程控制或与温湿度控制器的()。
[单项选择]What did the boy buy
[单选题]维护密封铅酸电池存放后开路电压每节12 V以下时,其剩余容量小于( )必须及时恢复充电,充足后方可使用。
A.A.40% B.B.50% C.C.60% [判断题]持有股票则意味着占有了股份有限公司的股份,取得了股东资格,可以行使股东权。由此可见,股票与股份是一种形式与形式的关系。()
[单选题]党的全国代表大会每( )举行一次。
A.3年 B.4年 C.5年 [判断题]监测系统是相对独立的电路,当监测系统本身故障时会影响电源屏正常工作。
A.正确 B.错误 [单项选择]走合期内的起重机,起吊重物时,以起重机允许起重量的()开始,逐渐增加荷载。
A. 30% B. 40% C. 50% [判断题]在Excel中,B3:D8与D3:B8代表的是同一区域。 ( )
[单项选择]女性,29岁,贫血、出血、感染,全血细胞减少,外周血未见幼稚细胞,为鉴别非白血病性白血病与再障,应进行的检查是()
A. 肝脾淋巴结是否肿大 B. 网织红细胞多少 C. 骨髓增生程度及原始细胞多少 D. 皮肤黏膜有无浸润 E. 巨核细胞多少 [单选题]在绝缘子串未脱离导线前,带电拆、装靠近横担的第一片绝缘子时,应采用专用短接线或()方可直接进行操作。
A. A.穿绝缘靴 B.B.穿防电弧服 C.C.穿屏蔽服 D.D.穿导电靴 [单项选择]作用在制动缸活塞上的压缩空气推动活塞,由活塞杆传出的力称为()。
A. 闸瓦压力 B. 制动原力 C. 制动压力 D. 制动倍率 [单选题]不宜在锅炉/窑炉调试、检修、维护、保养等非正常运行工况时期( )。
A.调整安全阀 B.进入现场 C.巡检 D.施工 [单选题]命令通常按级下达,情况紧急时,也可以( )下达。
A.直接 B.先后 C.送达 D.越级 [单选题]根据《会计法》的规定,()不属于担任会计机构负责人所必须具备的条件。
A.取得会计从业资格证书 B.具备会计师以上专业技术职务资格 C.从事会计工作3年以上经历 D.具备研究生以上学历 [简答题]以诺托为例请配出幕墙开启扇四点锁、内平开、外平开、内开内倒窗所需五金件的种类及最常用的开启扇的价格(市场公开价格)?
[判断题]对于临终患者而言,最后消失的感觉是视觉。( )
A.正确 B.错误 [判断题]V5.1接口接口由一条2048kbit/s链路组成,其所对应的接入网无集线功能,支持30B+D。
A.正确 B.错误 [单选题] 工作人员进入SF6配电装置室,入口处若无SF6气体含量显示器,应先通风( )min,并用检漏仪测量SF6气体含量合格。
A.8 B.10 C.12 D.15 [单项选择]使用金穗贷记卡只需在每月到期还款日前偿还(),即可继续使用剩余额度,循环往复。
A. 利息 B. 全部还款额 C. 最低还款额 D. 滞纳金 我来回答: 提交
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