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【多选题】
对于期货期权交易，下列说法正确的是（ ）。A.
买卖双方风险和收益结构不对称
B.
买卖双方都要交纳保证金
C.
在有组织的交易场所内完成交易
D.
采用标准化合约方式
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反馈参考答案：
举一反三
【单选题】听力原文：W: What does your friend do for a living? M: He's one of these people who give legal advice. Q: Who is the man's friend? (17)
A.
A lawyer.
B.
A teacher.
C.
A soldier.
D.
A doctor.
【单选题】听力原文：M：How can I get to work without a car? W：Why don't you call，a taxi? Q：What does the woman suggest the man do? (8)
A.
Call a friend.
B.
Take a taxi.
C.
Work on his car.
D.
Walk to work.
【单选题】W: How about your party last week? M: It was pretty successful and not a single friend was absent. What does the woman mean?
A.
One friend was absent from the party
B.
All her friends were present at the party
C.
Not all her friends participated in the party
D.
All her friends took partners to the part
【多选题】下列说法正确的是:
A.
电阻R 的单位：欧姆， 电导G的单位：西门子 S。
B.
欧姆定律只适用于线性电阻。
C.
伏安特性曲线不是过原点的直线，称为非线性电阻元件。
D.
线性电阻元件，开路时无限大，短路时为零。
【单选题】M: Excuse me,where can I find the manager in this building? I need to speak to him right now. W: Sorry,I can't help you. I'm not familiar with this building. My friend lives here. What does the woman ...
A.
She is a visitor.
B.
She just moved in here.
C.
She knows the manager.
D.
She is asking the way.
【单选题】以下说法错误的是
A.
非线性特性可以用于振荡和频率变换
B.
输入信号小时,可以用线形等效电路表示电子器件特性
C.
提高放大器效率不会涉及非线性
D.
线形和非线性都是电子器件的特点
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