题干：女性，63岁，因上腹隐痛并黏液血便4个月余入院，查体上腹部可扪及肿块。X线钡剂灌肠示横结肠靠近脾曲处充盈缺损。 其最可能的诊断为
A. 结肠息肉
B. 横结肠癌
C. 溃疡性结肠炎
D. 肠阿米巴
E. Crohn病
查看答案
With cases of food poisoning increasing, ___.
A. food irradiation should be carried out with care
B. it is more urgent to irradiate foods
C. medical researches into treatment of the diseased should be strengthened
D. Americans are beginning to accept food irradiation
The passage may be taken from ___.
A. a news report
B. a textbook of food processing
C. a book of popular science
D. a manual of food irradiation
Irradiated food ___.
A. certainly loses its nutritive value
B. maintains its nutritive value no different from the nonirradiated
C. keeps its nutritive value better than canned food
D. is recommended as the best of all preserved foods
While it is not directly stated, the article suggests that______.
A. insecticides are not dangerous to any small animals
B. insecticides do not always accomplish their purposes
C. insecticides are no longer being used to kill insects
D. insecticides do no harm to people
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