题目内容
（请给出正确答案）
下列关于期货交易与现货交易的区别，描述错误的是（）。
A.现货市场上商流与物流在时空上基本是统一的
B.并不是所有的商品都能够成为期货交易的品种
C.期货交易不受交易对象、交易空间的限制
D.期货交易的目的一般不是为了获得实物商品
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（由简答题聘请的专业题库老师提供的解答）
更多“下列关于期货交易与现货交易的区别，描述错误的是（）。A.现货市场上商流与物流在时空上基本是统一”相关的问题
A.中国证监会为国务院直属正部级事业单位。依照法律、法规和国务院授权，对期货市场实行集中统一的监督管理，维护其市场秩序，保障其合法运行
B.中国证监会作为中国期货市场的主管机关，为防范市场风险，规范市场运作，出台了一系列行政规章和规范性文件
C.中国证监会为全国人大财经委员会直属正部级事业单位，依照法律、法规和国务院授权，对期货市场实行集中统一的监督管理，维护其市场秩序，保障其合法运行
D.中国证监会作为中国银监会的下级机关，为防范市场风险，规范市场运作，出台了一系列行政规章和规范性文件
Trees are useful to man in three important ways: they provide him with wood and other prod-ucts; they give him shade; and they help to prevent droughts and floods.
Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. (78)In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without ,them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear.
This does not only mean that man will have fewer trees. The results are even more serious:for where there are trees, their roots break up soil--allowing the rain to sink in--and also bind the soil, thus preventing it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top-soil is gone, nothing remains but worthless desert.
Two thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It set up the empire but, without its trees, its soil became poor and it grew weak. When the empire fell to pieces, the home country found itself faced with floods and starvation.
What is the most important service of trees to man according to the passage？ 查看材料
A.They help him make money
B.They give him wood and other products
C.They help him prevent droughts and floods
D.They give him shade
A.Because an empire was set up.
B.Because the empire fell to pieces.
C.Because it lost its trees.
D.Because too much had been spent on wars.
A.resulted
B.obliged
C.demanded
D.recommended
A.intelligent
B.efficient
C.proficient
D.diligent
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