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【多选题】
以下关于抽样的说法正确的是A.
抽样的信号频谱必须是带限的。
B.
抽样后频谱混叠对信号的恢复没有影响
C.
抽样是对原始信号频谱进行周期性延拓的结果，只要保证之间不重叠即可。
D.
低通信号的抽样定理可以用到带通信号中。
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【判断题】The structure of a money market hedge is similar to a forward hedge. The difference is the cost of the money market hedge is determined by the differential interest rates, while the forward hedge is a...
A.
正确
B.
错误
【单选题】The problem he put forward at the meeting was _____. Which one of the following is “WRONG?” A．wo
A.
27. The problem he put forward at the meeting was _____. Which one of the following is “WRONG?” A．worth thinking over
B.
worthy to consider
C.
worthy of being thought over
D.
worthy of consideration.
【简答题】某校为了了解九年级学生体育测试成绩情况，抽查了一部分学生的体育测试成绩，甲、乙、丙三位同学将抽查出的学生的测试成绩按A、B、C、D四个等级进行统计，并将统计结果绘制成如下统计图，其中测试成绩在90～100分为A级，75～89分为B级， 60～74分为C级，60分以下为D级。甲同学计算出成绩为C的频率是0.2，乙同学计算出成绩为A、B、C的频率之和为0.96，丙同学计算出成绩为A的频数与成绩为B的频...
【简答题】技能是指经过学习和练习而培养形成的能力,学者辛迪.梵和理查德.鲍尔斯将技能分为三种类型 即: 、 、 。
【单选题】Forward exchange rates are normally quoted for value date of
A.
two days.
B.
one, two, three, six and twelve months.
C.
two years.
D.
do not have specific maturity date.
【单选题】-2.00-1.25×180 / -1.00 –1.75×90 = ( )。
A.
-4.25-0.50 ×180
B.
-4.75-0.50 ×90
C.
-4.25-0.50 ×90
D.
-4.25-1.00 ×90
【单选题】Forward exchange rates _________
A.
involve the immediate exchange of bank deposits.
B.
involve the exchange of bank deposits as some specified future date.
C.
involve the immediate exchange of imports and exports.
D.
none of the above.
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