更多“在关系代数运算中,__________操作会消去关系中的某些”相关的问题
皮肤增厚伴有鳞屑或有渗液的皮肤病的统称是
A.疥
B.癣
C.痘
D.疹
E.痒
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辅助核算项目设置的内容主要包括( )。
A.往来单位核算
B.部门核算
C.设备核算
D.项目核算
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()具体来讲就是社会行为规范和规章制度的合理性。这是社会公平正义的重要环节,是社会和谐的必要保障。
A.权利公平
B.机会公平
C.规则公平
D.分配公平
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The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, ________ this is largely because, ________ animals, we stand upright. This means that our noses are ________ to perceiving those smells which float through the air, ________ the majority of smells which stick to surfaces. In fact, ________ , we are extremely sensitive to smells, ________ we do not generally realize it. Our noses are capable of ________ human smells even when these are________to far below one part in one million. Strangely, some people find that they can smell one type of flower but not another, ________ others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate ________ smell receptors in the nose. These receptors are the cells which sense smells and send ________ to the brain. However, it has been found that even people insensitive to a certain smell ________ can suddenly become sensitive to it when ________ to it often enough. The explanation for insensitivity to smell seems to be that the brain finds it ________ to keep all smell receptors working all the time but can ________ new receptors if necessary. This may ________ explain why we are not usually sensitive to our own smells―we simply do not need to be. We are not ________ of the usual smell of our own house, but we ________ new smells when we visit someone else’’ s. The brain finds it best to keep smell receptors ________ for unfamiliar and emergency signals ________ the smell of smoke, which might indicate the danger of fire.
A.aboveB.unlikeC.excludingD.besides
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下列关于知识产权保护的说法中正确的有()。
A.知识产权保护的双轨制是指公力救济与私力救济
B.在知识产权侵权之诉中不能适用恢复原状、返还原物的救济措施
C.知识产权的保护范围需要法律给予特别的规定
D.知识产权的司法保护具有及时性、灵活性的特点
E.知识产权侵权纠纷发生后,权利人既可请求有关行政主管机关处理,也可直接向有管辖权的人民法院起诉
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在形态分析法中方案评选的标准包括()。
A.新颖性
B.先进性
C.实用性
D.技术经济指标
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下列与人工牙折断无关的是()
A . A.覆过大,前伸运动时撞击
B . B.塑料牙盖嵴部未磨粗糙、单体溶胀不够
C . C.人工牙与基托的接触面被分离剂污染
D . D.覆盖过大,前伸运动时撞击
E . E.人工牙的质量不好
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不应增加膳食纤维摄入的疾病有
A. 缺铁性贫血 B. 高脂血症 C. 糖尿病 D. 便秘 E. 骨质疏松
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患者腹泻1年,晨起则泻,泻后痛减,腹冷喜暖,腰酸腿软,舌淡,苔白,脉沉细。治疗除主穴外,应加用()
A.肾俞、关元
B.肝俞、太冲
C.内庭、曲池
D.曲池、三阴交
E.脾俞、太白
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保证业主对工程的控制权,不包括()。
A . A、工程变更权
B . B、进度计划审批权
C . C、合同双方风险的分配权
D . D、质量的绝对检查权
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下列哪项是效应评价的内容()。
A . 人群生活质量评估
B . 干预策略的预试验
C . 教育服务利用情况
D . 行为影响因素的变化
E . 了解目标人群对干预措施的看法
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能够使往复压缩机气缸内发出异常声音的原因是()。
A.气缸内进入液体造成液击
B.活塞环断裂、破碎
C.填料环损坏
D.气缸余隙过小
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一束自然光由空气射向玻璃,已知玻璃的折射率为,若使反射光线恰为线偏振光,则 (1)入射角应为多少? (2)此时折射角为多少?
一束自然光由空气射向玻璃,已知玻璃的折射率为,若使反射光线恰为线偏振光,则
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