试题题干
According to 
, acquisition and learning have different functions in the communication activities.
参考答案
试题解析
Krashen认为，习得和学习在交际活动中起着不同的作用。
According to , acquisition and learning have different functions in the communication activities.
Krashen认为，习得和学习在交际活动中起着不同的作用。