A.Only humans respond to emotions by shedding tears.B.Only humans shed tears to get rid of imitating stuff in their eyes.C.Only human tears can resist invading bacteria.D.Only human tears can discharge certain chemicals.
A.Only humans respond to emotions by shedding tears.
B.Only humans shed tears to get rid of imitating stuff in their eyes.
C.Only human tears can resist invading bacteria.
D.Only human tears can discharge certain chemicals.