The difficulty is predicting how electromagnetic fields might affect an aircraft s computers. Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and 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 vulnerable(易受损的)to interference raises the risk that terrorists may use radio system 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.
Q: It can be inferred from the passage that the author .
A) is in favor of prohibiting passengers use of electronic devices completely
B) has overestimated the danger of electromagnetic interference
C) hasn t formed his own opinion on this problem
D) regards it as unreasonable to exercise a total ban during flight
【题目译文】从本文推断出作者 。
【答案解析】A。纵观全文我们知道,作者对电磁干扰影响飞行安全感到担忧,所以应该是倾向于完全禁止乘客使用电子设备的。
Exercise 2
The rise of multinational corporations(跨国公司), global marketing, new communications technologies, and shrinking cultural differences have led to an unparalleled increase in global public relations or PR.
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