周期函数的频率取值是连续的,所以周期函数只有连续谱。( )
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Why does Zheyu Liu (刘哲瑜) want to learn English well?
A. He wants to communicate better with his friends.
B. He wants to go abroad to study.
C. He loves to learn English.
Kehai Meng (孟克海) suggests that the kid may have _______ if he or she lives with an American family.
A. cultural shock
B. a language barrier
C. difficulty in sharing their feelings
What does Liming Hou (侯立明) think of Chinese parents sending their kids to study English abroad?
A. It is a good experience to live in American families to learn English.
B. It can be a good experience so they can get a different angle of education.
C. It is a good experience to study in an English-speaking country.
According to Cun Hao（郝村），it is important to _________.
A. study English in an English-speaking country
B. improve Chinese
C. experience other cultures and understand other'ways of lives
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