病史：女性，54岁，腹痛、腹胀2个月，便中带血3周。诊断（）.
A.溃疡性结肠炎
B.升结肠癌
C.肠结核
D.正常腹平片
E.肠梗阻
参考答案：C
The Summer Palace is really beautiful. In fact, I doubt whether China has ________ park.[ ]
A. a more beautiful
B. a most beautiful
C. the most beautiful
D. a beautiful
管道末端采用防晃支架固定，支架与末端喷嘴间的距离不大于（）mm。
A.100
B.200
C.300
D.500
