单项选择题

根据我国相关法律的规定，下列关于合同解除的表述中，正确的是（　　）。

A.合同的解除专指法定解除
B.出卖人因未取得所有权或者处分权致使标的物所有权不能转移，买受人要求解除合同并主张损害赔偿的，人民法院不予支持
C.分期付款的买卖合同中可以约定出卖人在解除合同时可以扣留已受领价金
D.协议解除与约定解除的意思相同，只是名称不同而已
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Perfectionism often gets a bad rap in our culture,and it's easy to see why:Holding yourself to unrealistic or impossible standards can set you up for depression,anxiety,sleep disturbances and other health problems.But it.1 0ut that not all forms of perfectionism are bad.All forms of perfectionism include high standards.Yet, adaptive or healthy perfcctionism is 2 achieving things because you want to do well,3 maladaptive or unhealthy perfectionism is often 4 by fear of failure or fear of 5 others, one expert says.A study 6 maladaptive to adaptive perfectionism found that 7 people in both camps were comparably 8 about making mistakes.maladaptive perfectionists scored highest on 9 0f self-criticism,perceived stress and depression,while adaptive perfectionists scored highest on reappraisal（being able to change a situation's meaning to 10 it.s emotional effects）.11 aclaptive perfectionism,the person adapts well when things do not turn out as 12 0r hoped for or adjustments need to be made, notes study lead author Kenneth Rice,professor and co-director of the Center for the Study of Stress,Trauma,and Resilience at Georgia State University.13,someone with maladaptive perfectionism has the same high standards or performance 14. combined with an extremely high level of self-criticism,difficulty adjusting when the situation needs the person to adjust,and probably a fundamental core sense of inadequacy 15 things turn out well, he adds.16,the standards in and of themselves are not bad;it's the stuff people 17 to them that can make them 18, Rice says.Not surprisingly,research has 19 maladaptive perfectionism and contingent self-worth（which is tied to one's appearance or relationships）with an increased risk of 20 disordered eating and anxiety,among other health problems.8选？
A.concerned
B.suspicious
C.confused
D.curious
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Priests,teachers and parents have for generations advised their wards io think twice before speaking,to count to ten when angry and to get a good night's sleep before making big decisions.Social networks care little for seconcl thoughts.Services such as Facebook and Twitter are built to maximise virality ,making it irresistible to share,like and retweet things.They are getting better at it:fully half of the 40 most-retweeted tweets clate from January last year.Starting this month,however,users of WhatsApp,a messaging service owned by Facebook,will find it harder to spread content.They will no longer be able to forward messages to more than 20 0thers in one go,down from more than 100.The goal is not to prevent people from sharing information-only to get users to think about what they are passing on.It Js an idea other platforms should consider copying.Skeptics point out that WhatsApp can afford to hinder the spread of information on its platform because it does not rely on the sale of adverrisements to make money.Slowing down sharing would be more damaging to social networks such as Facebook and Twitter,which make money by keeping users on their sites and showing them ads.Their shareholders would surely refuse anything that lessens engagement.Sure enough,Facebook's shares fell by 23%in after-hours trading,partly because Mark Zuckerberg,its boss,said that its priority would be to get users to interact more with each other,not to promote viral content.Yet the short-term pain caused by a decline in virality may be in the long-term interests of the social networks.Fake news and concerns about cligital addiction,among other things,have already damaged the reputations of tech platforms.Moves to slow sharing could lielp see off harsh action by regulators and lawmakers.They could also improve its service.Instagram,a photo-sharing social network also owned by Facebook,shows that you can be successful without resorting to virality.It offers no sharing options and does not allow links but boasts more than a billion monthly users.It has remained relatively free of misinformation.Facebook does not break out Instagram's revenues,but it is thought to make money.The need to constrain virality is becoming ever more urgent.About half the world uses the internet today.The next 3.8bn users to go online will be poorer and less familiar with media.The examples of deceptions,misinformation and violence in India suggest that the capacity to manipulate people online is even greater when they first gain access to cligital communications.Small changes can have big effects:social networks have become expert at making their services compulsive by adjusting shades of blue and the size of buttons.They have the knowledge and the tools to maximise the sharing of information.That gives them the power to limit its virality,too.Skeptics hold that slowing down sharing would
A.failtocurbvirality
B.bebadforusers
C.donogoodtoadvertisers
D.goagainstshareholders
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