有关食管癌的治疗，正确的是（）.

A.各段食管癌均选手术治疗

B.单独化疗效果好

C.化疗适用于不能切除的上、中段食管癌

D.化疗不仅可加强放疗的作用，且严重不良反应发生率低

E.上段食管癌首选放疗

短文改错 （满分 5 分）

The Mid-autumn Festival, that is one important traditional festival in China, falls in August 15^th of the lunar calendar every year. It was celebrated both in China and many Asian country. People believe that a full of moon is the symbol of reunion and good luck. This is also a custom to express best wishes to their beloved ones at this particularly time. On that day they usually go back home to have a family get-together, so they appreciate the beautiful moon, enjoyed the typical food---the moon cake. All Chinese have wonderful time at the festival.