题干

随着第14届国际泳联世界锦标赛志愿者招募工作的启动,上海60多所高校数千名大学生踊跃报名。世游赛组织部门目前已筛选出100多名骨干志愿者,其中不少人参加过北京奥运会和上海世博会的志愿服务。为了迎接世游赛,他们已经开始精心准备。下列对志愿者的付出与回报说法正确的是(   )
①每一种责任都往往伴随着代价与回报
②承担责任付出的代价越大,得到的回报就越多
③很多代价与回报往往不能用金钱来衡量
④他们承担责任所获得的回报更多的是无形财富






A:①②③

B:②③④

C:①②④

D:①③④

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D

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Do you like spicy food?

    What's your opinion on spicy food? Some people cannot handle even the smallest amount of chili-red pepper-in their dinner while others can't get enough of it.

    Scientists have long been puzzled by why some people love chili while others loathe it. Plenty of research has been done on the subject, dating as far back as the 1970s. Previous results showed that a love of chili is related to childhood experiences, and cultural influences affect our taste buds too. But the latest study has found that a person's love of spicy food may be linked to his or her personality more than anything else, CBC News reported.

    'We have always assumed that liking drives intake-we eat what we like and we like what we eat. But no one has actually directly bothered to connect these personality traits with intake of chili peppers,' said Professor John Hayes from Pennsylvania State University, who led the study.

    But before you look at the study, you should first know that “spicy” is not a taste, unlike sour, sweet, bitter and salty. It is, in fact, a burning sensation that you feel on the surface of your tongue. This got scientists thinking that maybe a love of spicy food is brought about by people's longing for thrill, something they usually get from watching action movies or riding a roller coaster.

    In the study, 97 participants, both male and female, were asked to fill out questionnaires about certain traits of their personality, for example, whether they like new experiences or tend to avoid risks. They were then given a glass of water with capsaicin, the plant chemical that makes a chili burn, mixed into it.

    By comparing the answers to the questionnaire and what participants said they felt about the spicy water, researchers found that those who tended to enjoy action movies or take risks were about six times more likely to enjoy the spicy water.

    Interestingly, we used to believe that the reason some people can withstand spicy food is that their tongues have become less sensitive to it. However, this latest study has found otherwise. “It's not that it doesn't burn as badly, it's that you actually learn to like the burn,” Hayes explained.