Then the researchers put headphones(耳机) on dogs and played people’s voices to them. There were four different voices. Some were of positive words, such as “well done”, or negative words like “not good”. The words were also in different tones(语气). Some were pos...
3.根据Brain scans (扫描) showed that the dogs could recognize words, as well as the tones of words, much like people do.可知画线词在此意为“知道、了解”。 4.根据倒数第二段第一句话They also found that dogs deal with meaningful words with the left side of the brain ...