急性脑内血肿的CT表现特征是()
A.新月形稍低密度灶
B.新月形高密度灶
C.梭形高密度灶
D.脑内高密度灶
E.骨板下圆形高密度灶
参考答案:D
Every morning, he practices p______(发音) English words to improve his spoken English.
常用的密钥分发技术有CA技术和 _____________技术。