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10岁患儿，急性肾炎，近2天出现尿量明显减少，每日尿量在100ml以下，血尿素氮为20mmol/L，考虑合并有

急性肾功能不全。实验室检查以下哪项不符

A．血补体C3下降

B．血沉增快

C．高钾血症

D．低钠血症

E．代射性碱中毒

提问人：网友shallyblue66 发布时间：2022-01-07

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第5题

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根据以下材料回答题

Thousands of years ago man used handy rocks for his surgical operations．Later he used sharpbones or horns, metal knives and more recently, rubber and plastic．In the 1960s a new tool wasdeveloped, one which was, first of all, to be of great practical use to the armed forces and indus-try, but which was also to revolutionize the art and science of surgery．

The tool is the laser and it is being used by more and more surgeons all over the world．As weall know, light is hot, and any source of light will give warmth．But light is usually spread outover a wide area．The light in a laser beam, however, is concentrated．This means that a light withno more power than that produced by an ordinary electric light bulb becomes intensely strong as itis concentrated to a pinpoint-sized beam．

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The rapid development of laser techniques in the past ten years has made it clear that the futureis likely to be very exciting．Perhaps some cancers will be treated with laser in a way that makessurgery not only safer but also more effective．

Which of the following would be appropriate to describe the instruments of surgical opera-tions up until 1960s? 查看材料

A.Traditional．

B.Complicated．

C.Remarkable．

D.Revolutionary．

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