The fact that aircraft may be vulnerable(易受损的)to interference raises the risk that terrorists 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.
1.The passage is mainly about______.
A. a new regulation for all airlines
B. the defects of electronic devices
C. a possible cause of aircraft crashes
D. effective safety measures for air flight
Best Answer:C
详解:答案为C。纵观全文,主要讲述的是电磁波干扰可能是飞行安全的严重隐患。虽然未得到最后证实,专家们已开始指责飞机上一些电子装置的应用;还有人建议应全面禁止机上使用这些装置。然而由于很难测出电磁场是如何影响飞机航行的,航空业并没有全面下达禁令。
2. What is said about the over 100 aircraft incidents in the past 15 years?
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.
Best Answer:D
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