[名词解释]挫折

[单选题]甲：一家食品加工厂；乙：一家大型果园。甲因业务的需要，欲购进一批菠萝和荔枝。甲的公关部经理杨昆得知后，即向甲介绍了乙。甲委托杨昆办理此事。杨昆打电话给乙，称：甲需要菠萝100斤、荔枝500斤，每斤单价分别为2元和5元。另外，附加100斤樱桃，单价为8元；如有违约，应承担答案：10%违约金。乙表示同意。几天后，乙将货送到，甲的法定代理人亲自查收。由于客观原因，乙未领到货款而返回。后因樱桃产品不好销售，甲拒付货款。乙遂诉诸人民法院。甲表示，樱桃是杨昆擅自做主购回的，菠萝、荔枝价格太高，此事应由杨昆承担责任。 根据上述案情，结合《合同法》的有关规定，下列说法哪些是正确的？()
A.合同成立，杨昆有合法的代理权
B.合同成立，杨昆超越代理的行为得到追认
C.合同部分有效，部分无效
D.合同无效部分的民事责任由杨昆承担

[多选题]对下述哪些交易,可直接由资金营运中心根据自身资金头寸及市场情况灵活掌握,并按规定程序报批或续做,对其免核授信额度。
A.投资和交易国债、地方政府债、央行票据与政策性金融债。
B.与政策性银行开展的资金业务。
C.收益凭证
D.债券、同业存单和票据交易业务中银行机构作为交易对手
E.其他经有权审批人批准的低风险业务。

[单项选择]Sleep is a funny thing. We’ re taught that we should get seven or eight hours a night, but a lot of us get by just fine on less, and some of us actually sleep too much. A study out of the University of Buffalo last month reported that people who routinely sleep more than eight hours a day and are still tired are nearly three times as likely to die of stroke--probably as a result of an underlying disorder that keeps them from snoozing soundly.
Doctors have their own special sleep problems. Residents are famously sleep deprived. When I was training to become a doctor, it was not unusual to work 40 hours in a row without rest. Most of us took it in stride, confident we could still deliver the highest quality of medical care.
Maybe we shouldn’ t have been so sure of ourselves. An article in the Journal of the American Medical Association points out that in the morning after 24 hours of sleeplessness, a person’ s motor performance is
A. The University of Buffalo.
B. Jaya Agrawal.
C. Dr. Charles Binkley.
D. John Conyers Jr.