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问题 单项选择题 共用题干题

患者男性，35岁，因“阵发性右下腹痉挛性绞痛15日”来诊。患者排便后疼痛可缓解，无全身症状。查体：未触及包块，无梗阻。诊断：轻度克罗恩病。

首选药物为（）

A.泼尼松

B.氢化可的松

C.甲硝唑

D.硫唑嘌呤

E.柳氮磺吡啶

答案

参考答案：E

选择题

某合作学习小组讨论辨析以下说法：①纯净水和矿泉水都是纯净物；②用活性炭可将硬水进行软化；③太阳能、风能和天然气都是可再生能源；④霉变的大米（含有黄曲霉毒素）只要洗干净就可放心食用；⑤合金比组成合金的纯金属强度和硬度更高、抗腐蚀性能更好；⑥回收利用废旧金属不仅可以节约资源，而且可以减少对环境的污染．其中正确的是（　　）

A．⑤⑥

B．③⑤⑥

C．②④⑤

D．①②③④
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单项选择题

Ink-jet printer belongs to nonimpact printers in which the characters are formed by projecting particles or droplets of ink on to paper. (71) printer is also a nonimpact printer in which the characters are produced by applying hot elements to heat-sensitive paper directly or by melting ink from a (72) on to plain paper. Electrostatic printer creates an electrostatic latent image, which is then made visible by a toner and transferred and fixed on paper. An electrostatic printer may be used in some instances as a (73) . Laser printer creates, by means of a laser beam directed on a (74) surface, a latent image which is then made visible by a toner and transferred and fixed on paper. Magnetographic printer creates, by means of magnetic heads operating on a metallic drum, a latent image which is then made visible by a toner and transferred and fixed on paper. Computer-output-microfilm (COM) printer produces on a photographic film a (75) of each page.

（73）处填（）。

A．drawer

B．painter

C．plotter

D．brush
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