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某定时能见度观测，四周视野中1/3范围的水平能见度为8000米，1/3范围的水平能见度为8500米，1/3范围的水平能见度为9000米。则水平有效能见度应记录为（）。
A.8 B.9 C.8.5 D.30
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流行性乙型脑炎是（）。
A．消化道隔离
B．呼吸道隔离
C．虫媒隔离
D．血液/体液隔离
E．严密隔离
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1998年6月3日，由我国科学家参与研制的阿尔法磁力仪（AMS）搭乘美国“发现号”航天飞机顺利进入太空。
A.对 B.错
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在8051单片机扩展系统中，程序存储器和数据存储器共用16位地址线和8位数据线，为什么两个存储空间不会发生冲突？
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数字4／3系统单反相机的传感器比数字APS―C画幅单反相机的传感器小。
A . 正确
B . 错误
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磁感应式点火信号发生器的转子叶片数（）气缸数
A . 多于
B . 等于
C . 少于
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阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。 Diet, Alcohol Linked to Nearly One Third of Cancers Diet is second only to tobacco as a leading (1) of cancer and，along with alcohol，is responsible for nearly one third of cases of the disease (2) developed countries, a leading researcher said on Tuesday. Dr. Tim Key, of the University of Oxford, told a cancer conference that scientists are still discovering how certain foods contribute to (3) , but they know that diet, alcohol and obesity (4) a major role. "Five percent of cancers could be avoided (5) nobody was obese," he said. While tobacco is linked to about 30 (6) of cancer cases, diet is involved in all estimated 25 percent and alcohol (7) about six percent. Obesity raises the (8) of breast, womb, bowel and kidney cancer, while alcohol is known to cause cancers of the mouth, throat and liver. Its dangerous impact is (9) when combined with smoking. Key told the meeting of the charity Cancer Research UK (10) other elements of diet linked to cancer are (11) unknown but scientists are hoping that the EPIC study, which is comparing the diets of 500, 000 people in 10 countries and their risk of cancer, will provide some (12) Early results of the study have revealed that Norway, Sweden and Denmark have the (13) consumption of fruit and vegetables among European countries while Italy and Spain have the highest. Eating at (14) five portions of fruit and vegetables a day is recommended to reduce the risk of cancer. Key, principal scientist on the EPIC study, said it is looking at dietary links to some of the most common cancers (15) colorectal, breast and prostate. obesity n. 肥胖 bowel n.肠 dietary adj. 饮食的 prostate adj. 前列腺的 obese adj. 肥胖的 womb n.子宫 colorectal adj. 结肠直肠的
A．whileB．ifC．unlessD．since
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在东方雅韵社区，社会工作者注意到社区居民目前谈论最多的话题就是社区应该配置摄像头。按照需要类型进行分析，这种需要是( )。
A.规范性需要 B.感觉性需要 C.比较性需要 D.表达性需要
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反时限过电流继电器上的延时闭合触头,在线圈通电后瞬时打开,断电后延时闭合。()
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在《半夜谁来敲门（董恒波）》的《夹在门缝里的字条》这个故事中，小鹰看到的字条是几号楷体字？（）
A . 小四
B . 四号
C . 小三
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根据公司法律制度的规定，某股份有限公司董事会由9名董事组成，下列情形中，能使董事会决议得以顺利通过的有( )。
A．5名董事出席会议，一致同意
B．7名董事出席会议，4名同意
C．5名董事出席会议，4名同意
D．9名董事出席会议，5名同意
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结合胆红素是（）
A.胆红素-白蛋白 B.胆红素葡萄糖醛酸酯 C.胆红素-Y蛋白 D.胆素原 E.胆红素-阴离子
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