题目内容

偶函数的傅里叶级数中，不含（）项，含有（）项。

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A. Listening for gist.Listen to the recording once and answer the following questions.What is the recording about?[音频]

A. It is about the sports at night
B. It is about the activities at night
C. It is about the music at night
D. It is about the meeting at night

How many activities are mentioned?[音频]

A. 1
B. 2
C. 3
D. 4

B. Listening for details.2. Decide whether each of the statements is true (T) or false(F).[音频]The night market only opens at night.

A. 对
B. 错

The nightclub closes before midnight.[音频]

A. 对
B. 错