As _____ matter of fact, it's out of _____ question for her to finish so much work in such a short time.[ ]

A. a; a

B. a; the

C. /; /

D. /; the

枕骨大孔疝的主要临床表现有

A．剧烈头痛，频繁呕吐

B．颈项强直

C．血压增高，脉搏缓慢

D．呼吸骤停

E．以上均对