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【单选题】
下列说法错误的是：A.
和等腰三角波相比，含有的谐波更加丰富。
B.
频谱是描述非正弦周期波特性的一种方式，一定形状的波形与一定结构的频谱相对应，非正弦周期波的频谱是离散频谱。
C.
所谓谐波分析，就是对一个已知波形的非正弦周期信号，找出它所包含的各次谐波分量的振幅和频率，写出其里叶级数表达式的过程。
D.
的谐波成分中含有正弦成分的各奇偶次谐波。
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【判断题】The Chinese civilization has been called the only uninterrupted civilization in the world.
A.
正确
B.
错误
【简答题】The river is well known as the “Cradle of Chinese Civilization” because Chinese civilization begins on its banks. The first dynasty of China, ___________ Dynasty, was established in the Yellow River V...
【单选题】. —Do you know why the Yellow River basin is called the Cradle of Chinese Civilization? —Well, well, _____. I’ve never read about that.
A.
you really have me there
B.
there is some doubt
C.
I can’t tell you
D.
that depends
【单选题】Decision-thinking is not unlike poker—it often matters not only what you think, but also what others think you think and what you think they think you think: The mental process (过程) is similar. Natura...
A.
the process of reaching decisions
B.
the difference between poker and chess
C.
the secret of making good business plans
D.
the value of information in winning games
【单选题】听力原文：W: Press twelve, please. Thank you. M: You're welcome. That's also where I'm going to. Q: Where did this conversation most probably take place? (5)
A.
In a laundry.
B.
In a library.
C.
In an elevator.
D.
In a bakery.
【简答题】Beijing is the capital of China. It is also one of the birthplaces of the Chinese civilization (文明) and one of the six ancient capital cities in China. It is the second biggest city with an area of 17...
【单选题】听力原文：M: Hi, Helen, I've been looking for you! W: Really? Such a coincidence. I am also looking for you. M: You don't know how difficult it is to find a car I want. W: Have you been to the second-hand ...
A.
A cheap new car.
B.
An extravagant new car.
C.
An old Buick Century.
D.
A used car that's a bargain.
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