The discovery of echolocation may help with all of the following EXCEPT
A.measuring the depth of the sea B.distinguishing different kinds of fish C.improving the functions of radar D.varying the size and nature of an object正确答案C
The discovery of echolocation may help with all of the following EXCEPT
A.measuring the depth of the sea B.distinguishing different kinds of fish C.improving the functions of radar D.varying the size and nature of an object正确答案C
