脑外伤中，临床主要表现为意识障碍、出现局灶性症状及体征的是（）
A.脑震荡
B.脑挫裂伤
C.颅内血肿
D.脑干损伤
E.弥漫性轴索损伤
参考答案：B
论述发送电子邮件的过程。
One advantage of the all-purpose nozzle is that it（）.
A.can fit any size hose
B.converts a stream of water into a fog
C.increases the amount of water reaching the fire
D.can spray two streams of water at the same time
