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问题 单项选择题 A1/A2型题

胃肠道狭窄扩张治疗禁忌证（）

A.食管瘢痕狭窄

B.幽门梗阻

C.上胃肠道吻合术后吻合口狭窄

D.晚期食管癌或治疗后复发患者的治疗

E.食管灼伤后的炎症期

答案

参考答案：E

解析：1个月以内由于食管壁坏死，肉芽组织形成，导管插入时，容易造成穿孔或更为严重的狭窄。

单项选择题

D


Any mistake made in the printing of a stamp raises its value. A mistake on one inexpensive postage stamp has made the stamp worth a million and a half times its original (本来的) value. The mistake was made more than a hundred years ago in the British colony (殖民地)of Mauritius, a small island in the Indian Ocean. In 1847 an order for stamps was sent to a London printer—Mauritius was to become the fourth country in the world to issue (发行) stamps.
Before the order was delivered(传达), a party was planned at Mauritius’Government House, and stamps were needed to send out the invitations. A local printer was told to copy the design for the stamps. He printed the words " Post Office " instead of " Post Paid " by mistake on the several hundred stamps that he printed.
Today there are only twenty-six of these misprinted stamps left—fourteen Onepenny Orangereds and twelve Twopenny Blues. Because of the Twopenny Blue’s rareness (稀少) and age, collectors have paid as much as $ 16800 for it.

From the story we can see that ______.

A．all correctly printed stamps are worthless

B．Mauritians needed the stamps to send out invitations to a party

C．the printer was punished for his mistake

D．collectors are constantly looking for stamps with mistakes
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单项选择题

决定基本预备费的因素不包括( )。

A．工程费用

B．工程建设其他费用

C．引进技术和进口设备其他费用

D．基本预备费率
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