题目

下列现象属于扩散现象的是（     ） A.春天，柳絮飞扬      B.夏天，槐花飘香   C.秋天，黄沙扑面      D.冬天，雪花飘飘 答案：B—________ paper cutting used during the Spring Festival?-----People usually put them on doors or windows.A．Why didB．Why isC．How isD．How did