试题题干
Fill in each of the following blanks with a word or an expression.
We have distinct sounds at the lower level which is also called 
level.
参考答案
试题解析
我们有不同的声音在较低的层次，也被称为声音层次。
Fill in each of the following blanks with a word or an expression.
We have distinct sounds at the lower level which is also called level.
我们有不同的声音在较低的层次，也被称为声音层次。