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资料：As more personal business is conducted through smartphone devices , more users are implementing security measures for their devices, according to a recent survey by Harris Poll and commissioned by the CTIA.

The survey was a part of the company’s ongoing efforts to boost user education on the pitfalls of mobile security and assess whether the CTIA’s initiatives are working.

It turns out that mobile users in the US have begun implementing many of the initiatives set forth and have increased both awareness of, and protection for, their mobile devices:

More smartphone users are protecting their devices with PINs and passwords than in previous years. In 2016, of smartphone users had some sort of PIN/password, up from 2015 and form 2012.

An increasing number of smartphone users have installed built-in remote lock-and-erase software. Of survey respondents, have this type of lock-and-erase software installed, up an astounding from 2015 and from 2012.

Smartphone users are increasingly aware of the importance of anti-virus software. of smartphone users have an anti-virus software installed, compared with only of smartphone owners in 2015, according to BI Intelligence.

The survey results indicate that users are becoming increasingly aware of the danger posed by the increasing reliance on mobile technology form not only malicious entities like hackers, but also government surveillance. Specifically, users are increasingly seeking for ways to guard themselves in light of a number of recent high-profile incidents involving phone security–like Apple's case against the FBI, for example.

Because of this, it will become increasingly common for app developers and device manufactures to build in security and end-to-end encryption. This can be seen in devices and apps such as WhatsApp and iPhones. Developers and device manufacturers that don't include this feature in their products could be faced with negative consumer attitudes.

Which sentence best expresses the main idea of the passage?

A.Developers and device manufacturers are becoming more aware of security features
B.Lack of security features could result in negative consumer attitudes
C.Smartphone users are becoming more aware of security features
D.Smartphone users are becoming more aware of government surveillance

正确答案及解析

正确答案

解析

本题考查的是主旨大意。

【关键词】main idea of the passage

【主题句】第一段 As more personal business is conducted through smartphone devices, more users are implementing security measures for their devices...（由于越来越多的个人业务是通过智能手机操作，更多的手机用户开始为自己的手机提供安全保护。）

【解析】本题考查本文的主旨中心，主旨应和文章首段有关。根据第一段，作者讨论人们开始关注手机安全，也就是C选项“智能手机用户越来越关注安全特征”。A，B选项只在结尾段有提及Developers and device manufacturers（开发者和手机制造商）that don’t include this feature in their products could be faced with negative consumer attitudes（消费者负面态度）。不是整篇文章论述的中心内容。D选项在第七段中出现The survey results indicate … but also government surveillance（监守），是文章局部信息，不能作为本文主旨。