问题 多项选择题

关于期货交易与现货交易的区别,下列选项中说法正确的是()。

A.期货交易必须在期货交易所内进行,现货交易一般不受交易地点的限制

B.期货交易的交易对象和现货交易的交易对象都是标准化合约

C.期货交易从成交到收付之间存在时间差,现货交易即时成交或在很短时间内完成商品交收

D.期货实行每日无负债结算制度,而现货交易主要采用一次性结清的结算方式,同时也有货到付款或分期付款的方式

答案

参考答案:A, C, D

解析:现货交易的对象是实物商品或金融商品,期货交易的对象是标准化合约,而期货合约所指的标的物则是有限的特定种类的商品。也就是说,并不是所有的商品都能够成为期货交易的品种。因此,本题的正确答案为ACD。

阅读理解

              Our bodies are wonderfully skillful at keeping balance.When the temperature jumps, we sweat to cool down.When our blood pressure falls, our hearts can do something.As it turns out, though, our natural state is always changing.Researchers are finding that everything from blood pressure to brain function changes regularly with the cycles of sun, moon and seasons.And their insights (洞察力) are getting new ways for keeping away such common killers as heart disease and cancer.Only one doctor in 20 has a good knowledge of the scientific use of time in medicine.But according to a new American Medical Association, three out of four are eager to change that.“The field is exploding,” says Michael Smolensky.“Doctors used to look at us like, What spaceship did you get off ? Now they're thirsty to know more.”

In medical school, most doctors learn that people with chronic  conditions should take their medicine regularly.“It’s a terrible way to treat disease,” says Dr Richard Martin.For example, asthmatics (气喘患者) are most likely to suffer during the night.Yet most patients try to keep a constant level of medicine in their blood day and night, whether by breathing in on an inhaler (吸入器) four times a day or taking a pill each morning and evening.In recent studies, researchers have found that a large mid afternoon dose of a bronchodilator (支气管扩张剂) can be as safe as several small doses, and better for preventing nighttime attacks.

If the night belongs to asthma, the dawn belongs to high blood pressure and heart disease.Heart attacks are twice as common at 9 a.m.as at 11 p.m.Part of the reason is that our blood pressure falls at night, then rises as we start to work for the day.“Doctors know that,” says Dr.Henry Black of Chicago's Medical Center, “but until now, we haven't been able to do anything about it.” Most blood - pressure drugs provide 18 to 20 hours of relief (减缓).But because they’re taken in the morning, they're least effective when most needed.“You take your pill at 7 and it's working by 9,” says Dr.William White of the University of Connecticut Health Center “But by that time you've gone through the worst four hours of the day with no protection.” Bedtime medicine would prevent high blood pressure, but it would also push blood pressure to dangerously low levels during the night.

小题1:Researchers are finding that _________ .

A.heart disease and cancer are the most common killers of human beings

B.only blood pressure and brain function are decided by cycles of sun, moon and seasons

C.the functions of human bodies have much to do with nature

D.any change in human bodies goes with changes in the surroundings小题2:According to the author, it is best for asthmatics to take their medicine _________ .

A.at certain time

B.each morning and evening

C.when the disease occurs

D.at midafternoon小题3:Which of the following statements is NOT true?

A.Doctors know more about illnesses than before.

B.Doctors in the U.S.used to be thirsty to know more about the new medical field.

C.The researchers' insights are providing new methods to prevent common killers.

D.The correct use of time in medicine attracts more attention in medical circle in the U.S.A.

小题4:The suggested title for this passage might be _________.

A.Medicine Is Everything

B.Treatment Is Everything

C.Timing Is Everything

D.Prevention Is Everything

多项选择题