神经反射性晕厥主要的病理生理机制为()
A.血管通透性增加
B.脑组织的异常电活动
C.血管扩张
D.心肌收缩功能异常
E.心率减慢
参考答案:C, E
存储一个汉字和存储一个英文字母所占用的存储容量是相同的。( )
With so many people ______ in the mine(矿), none of the rescue workers would stop to have a rest.
A.being buried
B.to bury
C.buried
D.to be buried