颅内压增高时的调节是通过()
A、部分颅内压静脉血被排挤到颅外去
B、脑组织被压迫
C、脑脊液量的减少
D、血液氧分压及二氧化碳分压的调节
E、脑血管收缩
参考答案:A, C, D, E
They never gave up _______ hard to achieve their dream .
A.working
B.work
C.worked
D.to work
辊道按用途分为哪些类型?