Beijing is cold this time _____. You need _____ warm clothes if you go there.          [ ]

A. of  the year, to pack          

B. of  year, packing

C. of  year, pack              

D. of  year, to pack

仰韶陶器上的线条符号具备了（）

A、汉字形状

B、汉字结构

C、文字记载条件

D、书法艺术的雏型美