古诗“羌笛何须怨杨柳,春风不度玉门关”中的春风是指
A:春季风
B:夏季风
C:秋季风
D:冬季风
由于森林面积不断减少及二氧化碳排放量不断增多,现在全球环境出现( )
To everyone's surprise , Alex _____ play chess very much when he was only four .