肉毒杆菌对人致病的主要血清型有（）
A.E型
B.B型
C.G7型
D.C型
E.A型
参考答案：A, B, E
_____ his writing, the writer forgot to have his lunch. [ ]
A. Was absorbed in
B. Absorbed in
C. Absorbed into
D. Was absorbed into
男，25岁，突然剧烈头痛、呕吐3h入院。有偏头痛史8年。体检：神志清楚，颈抵抗，凯尔尼格（Kernig）征阳性。四肢肌力正常。
此患者诊断首先考虑（）
A.脑出血
B.蛛网膜下隙出血
C.偏头痛
D.结核性脑膜炎
E.三叉神经痛
