As it is discussed in the passage, the squeaks of bats can be functionally compared with ________.
A.human languages B.a mountainside C.a shoal of fish D.taps on a ship正确答案D
As it is discussed in the passage, the squeaks of bats can be functionally compared with ________.
A.human languages B.a mountainside C.a shoal of fish D.taps on a ship正确答案D
