Question

【题目】 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 device 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 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 although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce a total ban, given that many passengers want to work during flights.

The difficulty is predicting how electromagnetic fields might affect an aircraft’s computers. Experts know that portable device 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 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 an airlines

B.the drawbacks of electronic devices

C.a possible cause of aircraft incidents

D.effective safety measures for air flight

【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.

【3】Few airlines want to impose a total ban on their passengers using electronic devices because ______.

A.they don’t believe there is such a danger as radio interference

B.the harmful effect of electromagnetic interference is yet to be proved

C.most passengers refuse to take a plane which bans the use of radio and cassette players

D.they have other effective safety measures to fall back on

【4】It can be inferred from the passage that the author _____.

A.hasn’t expressed his own opinion on this problem

B.has overestimated the danger of electromagnetic interference

C.is in favor of prohibiting passengers’ use of electronic devices completely

D.regards it as unreasonable to exercise a total ban during flight

Answer 1

【答案】

【1】C

【2】D

【3】C

【4】A

【解析】

这是一篇说明文。文章主要讲了在过去的15年里，飞行员已经报告了超过100起可能是由电磁干扰引起的事故。这种干扰的来源还没有得到证实，但是专家们越来越多地把它归咎于移动电子设备，比如笔记本电脑、录音机和移动电话。

【1】主旨大意题。第一段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 device such as portable computers, radio and cassette players and mobile telephones.（在过去的15年里，飞行员已经报告了超过100起可能是由电磁干扰引起的事故。这种干扰的来源还没有得到证实，但是专家们越来越多地把它归咎于移动电子设备，比如笔记本电脑、录音机和移动电话。）是全文的主题句，结合全文内容，可知这篇文章主要讲了飞机事故的一个可能原因。故选C。

【2】细节理解题。根据第一段In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference.（在过去的15年里，飞行员已经报告了超过100起可能由电磁干扰引起的事故。）由此可知，过去的15年里，100起飞行事故可能是由电磁干扰引起的。故选D。

【3】细节理解题。根据第二段And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce a total ban, given that many passengers want to work during flights.（尽管一些航空公司禁止乘客在飞机起飞和降落时使用这类设备，但考虑到许多乘客希望在飞行期间工作，大多数航空公司都不愿实施全面禁令。）由此可知，很少有航空公司想要全面禁止乘客使用电子设备，因为大多数乘客拒绝乘坐禁止使用收音机和卡带机的飞机。故选C。

【4】推理判断题。文章作者客观的说明了在过去的15年里，飞行员已经报告了超过100起可能是由电磁干扰引起的事故。这种干扰的来源还没有得到证实，但是专家们越来越多地把它归咎于移动电子设备，比如笔记本电脑、录音机和移动电话。作者并没有在这个问题上表述自己的观点。故选A。

细节理解题大多是根据文章中的具体信息如事实、例证、原因、过程、论述等进行提问的。抓住文段中的事实和细节是做好该题型的关键，也是做好其它类型问题的基础。该题型几乎都可以在文章中直接找到与答案有关的信息，或是其变体。在一篇短文里大部分篇幅都属于这类围绕主体展开的细节。做这类题一般采用寻读法，即先读题，然后带着问题快速阅读短文，找出与问题和选项有关的词语或句子，再对相关部分进行分析对比，找出答案。正确选项虽然一般不是原文照搬，但是一般是原文的改写，意思不变。如换一个同义词，把否定改为肯定，把肯定改为否定等。如第2小题，根据第一段In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference.（在过去的15年里，飞行员已经报告了超过100起可能由电磁干扰引起的事故。）由此可知，过去的15年里，100起飞行事故可能是由电磁干扰引起的。故选D。