多项选择题

作为现代政府筹措资金的一种手段，公债的特征是：

A.强制性
B.自愿性
C.无偿性
D.有偿性
E.灵活性

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单项选择题

财政支出可以分为购买性支出和转移性支出，下列属于购买性支出的是( )。

A.社会保障支出
B.国债利息支出
C.社会文教支出
D.财政补贴支出

未分类题

听力原文： (32)Why do we cry? Can you imagine life without tears?Not only do tears keep your eyes lubricated, they also contain a substance that kills certain bacteria so they can't infect your eyes. Give up your tears, and you'll lose this on-the-spot defensE.Nor would you want to give up the flood of extra tears you produce when you get something physical or chemical in your eyes. Tears are very good at washing this irritating Stuff out.Another thing you couldn't do without your tears is cry—from joy, anger, or sadness.(35)Humans are the only animals that produce tears in response to emotions. And most people say a go0d cry makes them feel better.(33)Many scientists, therefore, believe that crying somehow helps us cope with emotional situations. Tear researcher, William Frey, is trying to figure out how it happens.One possibility, he says, is that tears discharge certain chemicals from your body, which build up during stress. 'When people talk about 'crying it out', I think that might actually be what they are doing,' he says.If Frey is right, what do you think will happen to people who restrain their tears? (34)Boys, for example, cry only about a quarter as often as girls once they reach their teenage years. And we all cry a lot less now than we did as babies.Could it possibly be that we face less stress? Maybe we've found other ways to deal with it. Or maybe we just feel embarrasseD.(33)A.Why people hold back their tears.B.Why people cry.C.How to restrain one's tears.D.How tears are produceD.

A.B.
C.
D.
E.
F.
G.
H.
(33)
A.Why
I.
B.Why
J.
C.How
K.
D.How

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