中国大学MOOC: In the following vowels, are back vowels.
举一反三
- 中国大学MOOC:"In the following groups of vowels, are mid vowels.";
- 中国大学MOOC: Pure vowels can be classified into three categories: front vowels, central vowels and back vowels. The two vowels/ɜː/ and /ə/ are classified into ______ vowels because they are made with the middle part of the tongue being raised.
- 中国大学MOOC:" In the following groups of vowels, are not all front vowels.";
- 中国大学MOOC: How can you distinguish between front vowels, central vowels, and back vowels?
- 中国大学MOOC: Which of the following are vowels?