题干

绿泥石的组成可表示为Al4Si4Ox(OH)y,其中x、y分别为(   )

A:10 8

B:7 10

C:8 10

D:9 7

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A

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Do you think you would work out more if you were offered money to do so? Science has shown that money can give people motivation to work out, but perhaps not in the way that you think.

According to a study published in the Annals of Internal Medicine Journal, the best strategy isn't offering money; it's giving someone money, then threatening to take it away.

Researchers gave 281 people the goal of walking 7,000 steps every day over 13 weeks.

To motivate the people who took part to reach the goal, researchers divided them into three groups.

People in the first group received $1.40(9 yuan) each day as long as they finished 7,000 steps, the second group was only able to collect the $1.40 if they had reached 7,000 steps the day before, and the third group was given $42 at the beginning of each month and $1.40 was taken away every time someone failed to meet the goal.

The third group met their daily fitness goals 50 percent more often than the other two groups, showing that people were most motivated to walk by the fear of losing money.

    “People are more motivated by losses than gains, and they like immediate gratification.” study author Dr Mitesh Patel, an assistant professor at the University of Pennsylvania in the US, told CNN. “They want to be rewarded today, not next year or far into the future.”

    Our brains tend to avoid wanting to lose things more than they try to get the benefits from gaining them, Patel explained. “It makes people think like the money is theirs to lose from day one.”

In addition, in most programs, many participants will drop out quickly and only the motivated will stay involved, Patel said.

    “In ours, we were pleasantly surprised that 96 percent stayed.” he added.

The study provides evidence that what matters is not only the money incentive (激励), but also how you think about them. This is important to how effective they are. The evidence could have a big effect on health promotion programs in the future, according to the study.

“Incentives themselves are not all you need,” Stephanie Pronk, a health and wellness consultant with the Aonplc corporation, told The Wall Street Journal. “It's really important to change up the incentive design and keep people on their toes.”

同类题5

大国在处理国际事务中的作用举足轻重,深刻影响着世界历史发展的进程。阅读下列材料,回答问题:

材料一  捷克斯洛伐克外交部长说:“我不知道你们的国家是否会从慕尼黑做出的决定中得到好处,但肯定无疑的是,我们不会是最后一个受害者。在我们之后,其他人也将遭遇同样的命运。”

——北师大版《历史》九年级下册

材料二   1945年2月3日,美、英、苏三巨头聚在一个名叫雅尔塔的小镇进行秘密谈判。会谈的目的是美、英双方希望苏联尽早落实对日宣战的时间,苏联则为此提出诸多要求,有许多内容涉及到中国的主权。罗斯福为了尽快让苏联出兵以减轻美军的伤亡,对于斯大林的要求并未加以拒绝,只是认为涉及外蒙古、大连商港和旅顺军港以及中长铁路的相关协议需要征求蒋介石的同意,而斯大林则建议此事应由罗斯福向蒋介石通告,并保证获得其同意。然而三方在会谈后发表的公告中,却对这些内容只字未提。

6月10日,美国大使奉总统的命令,向蒋介石当面报告有关雅尔塔会议中苏方提出的参战条件……这下子蒋介石真的被激怒了,斯大林对中国充满野心他是预料到的,但他没有想到的是,美国总统居然为了本国的利益,真的会牺牲他国的权益。至于谈判的最终结果,斯大林得到了他想要的一切。

——郑会欣《“忍气吞声,负重致远”:从蒋介石日记看他对雅尔塔协议的态度》

材料三   1945年后,经济冲突与共产王义和资本王义在意识形态的抵触是一致的……然而意识形态上的相互猜忌,却使美苏之间的利益冲突转为情感上的不合。双方都逐渐相信,对方企图摧毁自己的一切生活方式。包围与颠覆——这对孪生妖孽,在双方似乎能证实自己的假设不虚时,使真正成为一种存在的实体了。

——(美)罗伯特·帕克斯顿《西洋现代史》