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问题 单项选择题 A1/A2型题

关于CT扫描数据图像重建，叙述错误的是（）

A.对采集到的数据经过运算求得各坐标点的μ值再重建图像

B.迭代法是目前CT图像重建技术应用最广泛的方法

C.CT图像形成方式是图像重建

D.不同扫描方式图像重建方法会有改变

E.用原始数据经计算得到显示数据的过程称图像重建

答案

参考答案：B

解析：分解法是CT图像重建技术应用最广泛的方法，它的基础是傅立叶变换。

单项选择题

女性43岁，突发右上腹剧痛并阵发性加剧3天，寒战高热，恶心呕吐。体检:全身黄染，体温39℃，脉搏120次/分，血压80/60mmHg，谵妄，神志不清，剑突偏左腹肌紧张，肝肋下2cm，WBC15×10的9次方/L，中性80%血清总胆红素50μmol/L，本例治疗首选

A．抗休克，抗感染治疗

B．胆囊切除，腹腔引流术

C．胆囊造口术

D．胆总管减压引流

E．溃疡病穿孔缝合
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单项选择题

Throughout the 19th century and into the 20th, citizens of the United States maintained a bias against big cities. Most lived on farms and in small towns and believed cities to be centres of (1) , crime, poverty and moral (2) Their distrust was caused, (3) , by a national ideology that (4) farming the greatest occupation and rural living (5) to urban living. This attitude (6) even as the number of urban dwellers increased and cities became an essential (7) of the national landscape. Gradually, economic reality overcame ideology. Thousands (8) the precarious (不稳定的) life on the farm for more secure and better paying jobs in the city. But when these people (9) from the countryside, they carried their fears and suspicions with them. These new urbanities, already convinced that cities were (10) with great problems, eagerly (11) the progressive reforms that promised to bring order out of the (12) of the city.

One of many reforms came (13) the area of public utilities. Water and sewerage systems were usually operated by (14) governments, but the gas and electric networks were privately owned. Reformers feared that the privately owned utility companies would (15) exorbitant (过渡的) rates for these essential services and (16) them only to people who could afford them. Some city and state governments responded by (17) the utility companies, but a number of cities began to supply these services themselves. (18) of these reforms argued that public ownership and regulation would (19) widespread access to these utilities and guarantee a (20) price.

（9）（）

A.reallocated

B.migrated

C.replaced

D.substituted
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