每年4月下旬到5月上旬是杨柳絮的高发时节,高温催絮,京城无处不“飘雪”。公园里、小区内、马路上漫天的“飘雪”让行人都不敢使劲呼吸,小心翼翼地闪躲着,有的行人干脆戴上了口罩。马路边、草丛里也覆盖着大片飞絮,随风一吹便散开。一、飞絮产生的原因 Each year in late April to early May is the catkins catching the high season, high temperature Xu Xu, the capital everywhere “snow ”. Park, the district, the sky over the “snow ” so that pedestrians are afraid to hard breath, carefully dodging, and some pedestrians simply wear a mask. The roadside, the grass is also covered with a large fly Xu, diffused by the wind. First, Fei Xu produced the reason