Labiodentals are different form palatals in terms of ( ) .
According to place of articulation, （ ）are consonants for which for the flow of air is restricted by catching the tongue between the teeth.
Among the following consonants, （） is an oral voiced alveolar plosive.
The front vowels are different from the back vowels in terms of（ ）.
The sound [e] is（ ）vowel.
When the soft palate is lowered,the airstream from the lungs will have access to the nasal cavity as well as to the oral cavity.The consonants produced in this way are called （ ）consonants.
The sound [v] is（ ）.
Divide the following words into separate morphemes by placing a " + " between each morpheme and the next.
strengthen =
usefulness =
talented =
Divide the following words into separate morphemes by placing a “+” between each morpheme and the next：
Example ： bookshelf = book + shelf
Translate the following terms from English into Chinese.
morpheme
Divide the following words into separate morphemes by placing a " + " between each morpheme and the next.
sputnik =
oxen =
disobey =
Divide the following words into separate morphemes by placing a "+" between each morpheme and the next:
Example: bookshelf=book+shelf
friendly =
Fill in each of the following blanks with a word or an expression.
Two forms are a when they meet three conditions :1)they are different in meaning ,2) they differ only in one sound segment ,3)the different sounds occur in the same position in the strings .When a group of words meet all the three conditions ,they are called a minimal set.
For example, pit, bit, hit, fit, lit, sit, shit, etc. , belong to a minimal .
Which of the following is a minimal pair? （ ）
when they meet three conditions :1)they are different in meaning ,2) they differ only in one sound segment ,3)the different sounds occur in the same position in the strings .When a group of words meet all the three conditions ,they are called a minimal set.