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【多选题】
下列关于期货交易双向交易和对冲机制的说法．正确的有（）。A.
既可以买入，也可以卖出建仓
B.
合约到期不必进行实物交割
C.
它使投资者获得了双倍的获利机会，既可以低买高卖，也可以高卖低买
D.
通过吸引投资者的加入，提高了期货市场的流动性
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反馈参考答案：
举一反三
【单选题】What did Mr. Rochester go out for?
A.
For a house-party.
B.
For a business trip.
C.
For health check.
D.
For an important conference.
【单选题】What did Rochester decide to do with Jane?
A.
Leave Thornfield Hall.
B.
Plan another wedding ceremony.
C.
To live together despite of his present wife.
D.
To fight with Mr. Mason.
【单选题】What did Mr. Rochester tell Jane one afternoon?
A.
His business in Paris.
B.
His love affair in Paris.
C.
His education.
D.
His family problem.
【单选题】What did Mr. Rochester plan at Thornfield?
A.
A house party.
B.
An Opera.
C.
A birthday celebration.
D.
A costume ball.
【单选题】what favor did Jane do to Mr. Rochester?
A.
To fetch Mrs. Fairfax for him.
B.
To help him wald to his horse.
C.
To buy him some medicine.
D.
To offer him some first aid.
【简答题】使用者对媒体操纵控制的难易程度、教学媒体制作和操纵起来是否方便是教学媒体的什么特点A. 呈现力 B. 重现力 C. 传送能力 D. 可控性
【单选题】What musical instrument did Mr. Rochester ask Jane to play?
A.
Piano
B.
Violin
C.
Guitar.
D.
Harp
【单选题】What did Mr Rochester need in the sitting room?
A.
Candles.
B.
Flowers
C.
Companions
D.
Books and Candies.
【简答题】什么叫碎胀性?
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