急性硬脑膜外血肿CT扫描的典型表现是

A．环形低密度区

B．梭形高密度区

C．片状混杂密度区

D．楔形低密度区

E．半月形高密度区

There is a saying that acting before thinking always _________ failure.

A．requires of

B．results from

C．results in

D．belongs to