在显微镜下，弥漫性轴索损伤的特征性病理改变是（）。
A.轴缩球
B.神经细胞坏死
C.炎症细胞浸润
D.脑组织出血灶
E.脑组织水肿
参考答案：A
His interest in stamp collecting _____ his school days.[ ]
A. is dated from
B. dates backs to
C. is dated backed to
D. dates
论述折页折数对产品质量的影响。
