题目

The visitors here are greatly impressed by the fact that _______ people from all walks of life are working hard for _____ new Chengdu. A.不填; a          B. 不填;the          C. the; a          D. the; the  答案：A 解析: 略（2011?广州模拟）以下与人体相关的物理量的估测值，其中正确的是（　　）A．人站立时对地面的压强为104paB．人体的密度为1kg/m3C．人的脖子的周长是400cmD．人的手指甲的宽度为10-3m