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问题 单项选择题

FOM-20光电转换器当选用851nm多模光信号进行数据传输时，其接受灵敏度（）dBm、。

A.-18 

B.-48

答案

参考答案：B

解析：

题目来源：FOM-20说明书（P1-8）

专业类型：继电保护

设备类型：线路

难度等级：C

电压等级：501kV

知识点：调试

问答题

急性肾小球肾炎 ［病例摘要］ 男性，9岁，浮肿、血尿10天，进行性少尿8天患儿10天前晨起发现双眼睑浮肿，尿色发红。8天前尿色变浅，但尿量进行性减少，每日130-150ml，化验血肌酐498.6μmol/L，拟诊为"肾实质性肾功能不全"，曾给扩容、补液、利尿、降压等处理，病情仍重。3天前甘露醇和中草药交替灌肠，口服氧化淀粉及速尿治疗，尿量增至300-400ml/日。患儿两月来有咽部不适，无用药史，患病以来精神食欲稍差，大便正常，睡眠可。既往曾患"气管炎、咽炎"，无肾病史。查体：T36.9℃，P90次/分，R24次/分，Bp145/80mmHg，发育正常，营养中等，重病容，精神差，眼睑浮肿，结膜稍苍白，巩膜无黄染。咽稍充血，扁桃体Ⅰ°-Ⅱ°肿大，未见脓性分泌物，粘膜无出血点。心肺无异常。腹稍膨隆，肝肋下2cm，无压痛，脾未及，移动性浊音（-），肠鸣音存在。双下肢可凹性水肿。化验：Hb83g/L，RBC2.8×1012/L，网织红1.4%，WBC11.3×109/L，分叶82%，淋巴16%，单核2%，plt207×109/L，ESR110mm/h，尿蛋白（++），红细胞10-12/高倍，白细胞1-4/高倍，比重1.010，24小时尿蛋白定量2.2g。血生化：BUN36.7mmol/L，肌酐546.60μmol/L，总蛋白60.9g/L，白蛋白35.4g/L，胆固醇4.5mmol/L，补体C30.48g/L，抗ASO：800IU/L.要求：根据以上病历摘要，请写出初步诊断、诊断依据（如有两个以上诊断，应分别写出各自诊断依据，未分别写出扣分）、鉴别诊断、进一步检查与治疗原则。
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单项选择题

Another critical factor that plays a part in susceptibility to colds is age. A study done by the University of Michigan School of Public Health revealed particulars that seem to hold true for the general population. Infants are the most cold-ridden group, averaging more than six colds in their first year. Boys have more colds than girls up to age three. After the age of three, girls are more susceptible than boys, and teenage girls average three colds a year to boys’ two.
The general incidence of colds continues to decline into maturity. Elderly people who are in good health have as few as one or two colds annually. One exception is found among people in their twenties, especially women, who show a rise in cold infections, because people in this age group are most likely to have young children. Adults who delay having children until their thirties and forties experience the same sudden increase in cold infections.
The study also found that economics plays an important role. As income increases, the frequency at which colds are reported in the family decreases. Families with the lowest income suffer about a third more colds than families at the upper end. Lower income generally forces people to live in more cramped quarters than those typically occupied by wealthier people, and crowding increases the opportunities for the cold virus to travel from person to person. Low income may also adversely influence diet. The degree to which poor nutrition affects susceptibility to colds is not yet clearly established, but an inadequate diet is suspected of lowering resistance generally.

Which of the following most probably means the word "particulars" underlined in Paragraph 1

A．Minor errors.
B．Specific facts.
C．Small distinctions.
D．Individual people.
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