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问题 多项选择题

下列关于金融期货的说法正确的有（）。

A.其盈利或亏损的程度决定于价格变动的幅度

B.在对冲或到期交割前，价格的变动必然使其中一方盈利而另一方亏损

C.交易双方都无权违约，但可以要求提前交割或推迟交割，也可以在到期前的任一时间通过反向交易实现对冲或到期进行实物交割

D.交易中双方理论上潜在的盈利和亏损都是无限的

答案

参考答案：A, B, D

解析：熟悉金融期货与金融期权的区别。

单项选择题

通过5000kg/h的原料乙烷进行裂解制乙烯。反应掉的乙烷量为3000kg/h，得到乙烯量为1980kg/h，该反应的选择性为（）。

A、60％；

B、70.7%；

C、39.6%；

D、20.4%。
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填空题



I’d like to talk about (1) in England and Wales, and in England and Wales there are (2) of council. For instance, if I could take the example of Oxfordshire, there is (3) where they are responsible for education, (4) , structure planning, highways, (5) , and so on. And there are (6) district councils, again in Oxfordshire, and they are (7) , in particular council housing, for local plans, for (8) , environment health, and they’re also responsible for (9) , and in Oxford, for instance, they are building an ice-rink (10) of the city.
If we could (11) the question of education, I think this would (12) of local government in the (13) . First of all, there is a minister at (14) level. He is the (15) for Education and he’s responsible for running a (16) education system in the (17) . But (18) there is a lot of local control. So the local councils, (19) such as Oxfordshire County Council, actually run the schools and colleges in their (20) .
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