The nature of tone is mainly determined by ().
A. timbre
B. Sound length
C. pitch
D. Intensity of sound
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The first textbook of TCFL published in China is ().
A. Basic Chinese textbook
Basic Chinese
Chinese textbook
D. Practical Chinese textbook
In TCFL, the most important criterion for selecting words is ().
A. Spoken Chinese
B. Simple in meaning
Commonly used, word building
D. It has a wide trial range and rich cultural connotation
The structural unit with the ability to form Chinese characters is ().
A. Strokes
B. Whole word
C. parts
D. Stroke order
Which of the following vowels is different from the others in actual pronunciation?
A. en
B. ueng
C. eng
D. ie
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