高度层的改革是为了()
A、减少航道容量
B、加大航道容量
C、增大延误
D、减少延误
参考答案:B, D
脑血管畸形突然倒地,昏迷,脉搏52次/分,双瞳孔不等大,左:右=4mm:2mm,右侧锥体束征阳性。诊断首先考虑()。
A.小脑幕切迹疝
B.小脑扁桃体疝
C.视神经损伤
D.颅内低压
E.原发性脑干损伤
The teacher was angry about his being late for class, but he behaved ______ nothing had happened.
A.as
B.even if
C.as if
D.even though