.— Can I use the telephone on the table,sir?

—Under no circumstances____to use the telephone in the office for personal affairs.    

A．anyone is allowed

B．nobody is allowed

C．is anyone allowed

D．is nobody allowed

变应性鼻炎发作时，喷嚏连续发作的原因是（）。

A.鼻腔阻力血管收缩，鼻涕增多

B.鼻腔容量血管扩张，黏膜水肿

C.毛细血管通透性增高

D.感觉神经敏感性增强

E.副交感神经活性增高，腺体增生