—Why does Joe look so _______ today?

—Because she has got an "A" in her English test. [ ]

A. exciting

B. sad

C. happy

D. angry

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