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【多选题】
下列关于β系数的说法中正确的有()A.
β系数度量了股票相对于平均股票的波动程度
B.
β=2,说明股票的风险程度也将为平均组合的2倍
C.
β=0.5,说明股票的波动性仅为市场波动水平的一半
D.
证券组合的β系数是单个证券β系数的加权平均,权数为各种股票在证券组合中所占的比重
E.
β系数一股不需投资者自己计算,而由一些投资服务机构定期计算公布
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举一反三
【单选题】When he was out of work, Frank was a couch potato and he
A.
put on a lot of weight
B.
lost a lot of weight
C.
l ost a lot of height
D.
put on a lot of height
【单选题】When will college students curb their spending and only buy what is necessary?
A.
After they have lived on campus for a relatively long time.
B.
When they have got used to living according to their money-spending plan.
C.
After they have had roommates to share furnishing or grocery expenses with them.
D.
When they have known that their hard- earned money shouldn’t go to movies.
【单选题】Who can be greeted by using“Haven’t seen you for ages”?
A.
Strangers
B.
Old friends
C.
Newly-met friends
D.
Any one one meets.
【简答题】在测定弱电解质电离常数的实验中,电极不用时,应将其浸入 中。
【单选题】Who can be greeted by using "Haven't seen you for ages"?
A.
Strangers
B.
Old friends
C.
Newly-met friends
D.
Anyone you meet.
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