单选题

Living Alone Could Be Good for Your Weight

Good news for people living alone: A forthcoming paper shows that single adults—of any sexual orientation—are physically healthier when it comes to body mass index (BMI). The study, which appears in the January edition of the Journal of Family Issues , found that living without a partner—either divorced or never married—is associated with lower body weight.
On the other hand, co-habiters and married people, whether male or female, had higher BMIs, a calculation of weight and height that studies have linked to chronic conditions such as diabetes, heart disease, some types of cancers, and, ultimately, higher rates of mortality.
Sociologist Jay Teachman of Western Washington University used 20 years of data from the 1979 National Longitudinal Study of Youth and more than 3,000 participants to examine body weight, marital status, and what he calls relationship "transitions"—that is, breakups.
He tracked people"s BMIs from adolescence to middle age (between 39 and 42 years old) and found people experienced a short-term weight loss after divorce, which he believes is probably stress-induced. Generally, Teachman thinks, couples that live together are heavier because they"re more likely to share meals and cook together.
"The divorce effect fades over time," Teachman told Science of US . "But the data show that "the appearance effect" persists. Single people are thinner and likely more concerned about how they look because they are in the dating market."
His research is a departure from some of the conventional wisdom that coupled people tend to be fitter—and adds a wrinkle to the numerous links between marriage and positive health outcomes. Nevertheless, Teachman acknowledges a caveat in his work: The difference in body weight between a married and single individual was about three pounds at any point in time. At higher BMIs, a three-pound spread could push the average respondent into the obese category—and the individuals in this study were fairly young. Since the data cut at age 42, people still had a lot of potential weight-gaining decades ahead of them.

单选题 According to the study, a person living without a partner is ______.

【正确答案】 B

【答案解析】[解析] 事实细节题。根据第一段“A forthcoming paper shows that single adults—of any sexual orientation—are physically healthier when it comes to body mass index (BMI) ...found that living without a partner—either divorced or never married—is associated with lower body weight.”可知，一份即将发表的论文称单身成年人，无论其性取向如何，就身体质量指数而言，他们总是更为健康，没有伴侣(离异或未婚)都和较轻体重相关。故选B。

单选题 People with higher BMIs are easily caught by the following diseases EXCEPT ______.

【正确答案】 D

【答案解析】[解析] 事实细节题。根据第二段“...co-habiters and married people, whether male or female, had higher BMIs, a calculation of weight and height that studies have linked to chronic conditions such as diabetes, heart disease, some types of cancers, and, ultimately，higher rates of mortality.”可知，同居者和已婚人士，无论男女，身体质量指数都偏高，身体质量指数计算的是身高和体重，研究称指数高和糖尿病、心脏病、某些癌症等慢性疾病相关，最重要的是，死亡率也高。糖尿病属于代谢类疾病(A)，心脏病属于心血管类疾病(B)，唯独没有提到肺部疾病。故选D。

单选题 According to Teachman, couples that live together are heavier because they ______.

单选题 According to Teachman, single people are driven to keep body shape by ______.

单选题 Teachman"s conclusion differs from the conventional ideas possibly because ______.

【正确答案】 C

【答案解析】[解析] 事实细节题。全文介绍了蒂奇曼的研究，根据最后一段“At higher BMIs, a three-pound spread could push the average respondent into the obese category—and the individuals in this study were fairly young. Since the data cut at age 42, people still had a lot of potential weight-gaining decades ahead of them.”可知，已婚人士与单身人士任何时候的体重差异都是大约3磅，正因为此番参加研究的人员都相当年轻，3磅之差就可以把参与调查者列入肥胖者之列。由于数据截止到42岁，数十年内人们体重增长的可能性依旧很大，所以这也是蒂奇曼的研究与传统观念相悖的原因。故选C。