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. Currently, rules on using these devices are left up to individual airlines. And alt A. They may have been caused by the damage to the radio systems. B. They may have taken place during take-off and landing. C. They were proved to have been caused by the passengers’ portable computers. D. They were suspected to have resulted from electromagnetic interference. [单项选择]垂体手术未发现肿瘤而临床症状严重的Cushing病()
A. 经蝶窦切除垂体微腺瘤 B. 垂体放疗 C. 一侧肾上腺全切+另侧肾上腺大部切除,术后作垂体放疗 D. 开颅手术+垂体放疗 [填空题]小型开启式压缩机添加润滑油,可由()截止阀多用孔吸入。
[单项选择]片剂的润滑剂()。
A. 氟利昂 B. 磷脂类 C. 白蛋白 D. 硬脂酸镁 E. 羊毛脂 [判断题]保护接地和工作接地(变压器中性点接地)的接地电阻不超过20Ω。
A.正确 B.错误 [多选题]根据行政强制法规定,中止执行事由( ):
A.当事人履行行政决定确有困难或者暂无履行能力的; B.第三人对执行标的主张权利,确有理由的; C.执行可能造成难以弥补的损失,且中止执行不损害公共利益的; D.当事人死亡而无执行财产 [单项选择]上消化道出血时,一旦出现呕血,便提示胃内贮积的血量在
A. 5~20 ml B. 50~70 ml C. 250~300 m1 D. 500~800 ml E. 800~1000 ml [判断题]电位式分析法是通过测量电极系统与被测溶液构成的测量电池的电动势,获知被测溶液离子活度的分析方法。
A.正确 B.错误 [多选题]BTA系统资金账户签约类业务包括( )。
A.签约 B.解约 C.修改客户资料 [单选题](参考图4-111)由图可知,重心位置相同的是( )
A.A点和C点 B.A点和B点 C.C点和D点 D.B点和C点 [单项选择]布氏杆菌病的典型热型为()
A. 稽留热 B. 弛张热 C. 间歇热 D. 波状热 E. 不规则热 我来回答: 提交
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