Dear Sir or Madam,

With reference to your advertisement in China Daily on November 28th, 2008, I am writing to express my interest in applying for the captioned post.

I am presently a programmer at Success Securities. Ltd., and my 2-year contract will expire soon. By applying for the post I am looking forward to switching to a larger, more sophisticated and more computerized company so that I can enrich myself to meet the challenges that a large company poses.

Please refer to the enclosed resume for the technical details of my past duties. I would be available for an interview at your convenience. Thank you for your attention to this application.

×××

What does he do at present
He is（）

酵母菌和大肠杆菌都是单细胞生物，但大肠杆菌属于细菌，而酵母菌却属于真菌．这主要是因为酵母菌的细胞中（　　）

A．有细胞壁

B．有细胭膜

C．没有叶绿体

D．有真正的细胞核