Syllables are short when they are stre...

判断题Syllables are short when they are stressed.（）

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1.判断题The most powerful signal of stress is a change of pitch on the vowel.（）

2.判断题Of the four possible tune movements, high fall is used for statements and wh-questions; high rise is used for questions asking for repetition of something; low rise is for yes/no questions, etc. and fall rise is for corrections and polite contradictions.（）

参考答案：对

3.判断题Usually low key is used for emphasis and contrast; mid key indicates an expected, neutral attitude; and low key provides low information.（）

参考答案：错

4.判断题Pitch is produced by frequency of vibration of the vocal cords. The higher the frequency, the higher the pitch.（）

参考答案：对

5.判断题Of the two types of sentence stress, sense stress shows contrast, while logical stress shows meaning.（）

参考答案：错

6.判断题The back-chaining technique means the students repeat a sentence after the teacher, starting from the end part of the sentence and moving towards the beginning.（）

参考答案：对

7.判断题A phoneme is the smallest distinctive sound unit, incapable of change in different phonetic environments.（）

参考答案：错

8.判断题Consonants vary depending on where and how the air stream gets through, the place and movement of the tongue, and also whether the voice is used or not.（）

参考答案：对

9.判断题Vowels are formed mainly by the position of the tongue and, secondarily, by the shape of the lips and movement of the jaw.（）

参考答案：对

10.判断题The vowel is produced without (or with little) restriction during its production and is always voiced.（）

参考答案：对