Humans can distinguish about ______.A．10,000 different odorsB．10 different odorsC．1,000 di

Learn as much as you can about a clinical triald________.

Humans can easily _______ the emotional expressions of chimpanzees.A) cooperate withB)

A（n)______ is the smallest unit of sound in a language, which can distinguish two words.A．

This is the most important aspect______ civilized man can be distinguished from primitive

All the characteristics that distinguish birds _____ other animals can be traced to

All the characteristics that distinguish birds _____ other animals can be traced to