(2013·吉林长春三校高三调研)China is expected to export 1 billion mobile phones this year, ________ by a surge in demand for smartphones worldwide.

A．drive

B．driving

C．to drive

D．driven

突然发现甲状腺单个结节、胀痛，并迅速增大，既往未注意有无结节，应首先考虑诊断为（）

A.甲状腺腺癌

B.甲状腺腺瘤

C.结节性甲状腺肿

D.甲状腺炎

E.甲状腺囊性腺瘤囊内出血