Thebiggestsafetythreatfacingairlinestodaymaynotbeamanwi...
问题详情:
The biggest safety threat facing airlines today may not be a man with a gun but the man with the portable computer in business class. In the last 25 years, pilots have reported well over 200 incidents that (25) __________ have been caused by electromagnetic interference. Unclear (26)______________ the source of this interference remains, increasingly, experts have found out that portable electronic devices such as portable computers, radio and mobile telephones are (27)_____________(blame).
RTCA, an organization which advises aviation industry, has suggested that all airlines ban such devices from (28) _____________(use) during “key” stages of flight, particularly take-off and landing. Some experts have gone (29)______________ (far), calling for a total ban during all flights. Nowadays, rules on using these devices are left up to airlines. And although some airlines ban passengers from using such equipment during take-off and landing, most are not willing to enforce a total ban, if many passengers want to work during flights.
The difficulty is understanding (30)_____________ electromagnetic fields might affect an aircraft's computers. Experts know that the portable devices give off radiation, each (31) ______________(affect) those wavelengths which aircrafts use for communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not. .
The fact that aircraft may be in trouble because of the interference raises the risk (32)____________some people may use radio systems in order to damage navigation(*) equipment. As worrying, though, is the passenger who can't hear the instructions to turn off his radio because the music's too loud.
【回答】
25. could / may / might 26. as 27. to blame 28. being used 29. further 30. how
31. affecting 32. that
知识点:阅读填空
题型:阅读填空
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问题详情:打秋千时,为使秋千越荡越高,人应有一个从直立到蹲下,又从蹲下到站直的过程.则打秋千时 A.人的机械能是守恒的 B.人应在最低点站起来 C.人应在最高点站起来 D.人在最低点时失重【回答】C知识点:未分类题型:选择题...
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