2016年英语四级最新模拟试卷四

2016年英语四级最新模拟试卷四,标签：英语六级考试题,英语六级考试真题,英语六级考试题型,http://www.duoxue8.com
RTCA, an organization which advises the aviation（航空）industry, has recommended that all airlines ban
（禁 止）such devices from being used during (4 ) stages of flight, (5) 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 although some airlines prohibit passengers from using such equipment during take-off and landing, most are (6) to enforce a total ban, given that many passengers want to work during flights.
The difficulty is (7) how electromagnetic fields might affect an aircraft’s computers. Experts know that portable device emit radiation which (8) 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 systems in order to damage navigation (9) . As worrying, though, is the passenger who can’t hear the instructions to turn off his radio because the music’s too (10) . 词语选项：

A、definite B、incidents C、effects D、remains E、critical 
F、particularly G、reluctant H、refreshing I、portable J、enormous 
K、predicting L、liberal M、affects N、equipment O、loud www.duoxue8.com的

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2016年英语四级最新模拟试卷四 结束。