The researchers analyzed data of heart attack cases between February. 2007 and December 2011. They interviewed nearly 1,500 patients to gather information and figure out what could be potential triggers of heart attack. The participants were asked standardized set of questions, such as what they were doing the day of the heart attack, where exactly they went, what means of transportation they used and how much time they spent in a traffic jam.

　　The experts found that driving a car turned out to be the most common source of traffic exposure, however, using public transportation or riding a bicycle were also other forms of traffic exposure. The researchers reported that 8% of all heart attack cases were specifically linked to having been in traffic. In general, time spent in any type of transportation in traffic was associated with more than 3 times higher risk for experiencing a heart attack within the first hour immediately following the exposure.

　　The team has also found that women, elderly men, patients who were unemployed, and those with a history of angina(心绞痛) appeared to be particularly sensitive and were affected the most by traffic. Female participants, in fact, were more likely to have a 5 times greater risk for a heart attack following such exposure, compared to men.

　　1. The best title for the passage is probably ________.

　　A. Traffic Jams — a Great Killer

　　B. Be Sure to Avoid Traffic Jams

【2016届高三英语一轮复习题组层级快练：（三十三）外研版选修6】相关文章：

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (52)

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（18）及答案

★ 【浙江专用】2014届高考英语一轮复习课时作业(三十七)选修8Unit 2《Cloning》

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (39)

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练：6（含解析）

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第19组（含解析）

★ 2017届高考英语（江苏专用）二轮复习高考单词5大记忆法课件：4.联想记忆法

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修7 unit5《Travelling abroad》

★ 2014届高考英语一轮复习必修4参考答案（外研版）

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：考纲解读（含解析）