更多“1970年12月1日，77国代表在荷兰召开特别会议，讨论并通”相关的问题
所谓修理尺寸是将零件已磨损表面通过机械加工，恢复其正确的（）并与相配合零件恢复（）的一种加工方法。
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设随机变量Xi的分布函数为Fi(x)，概率密度函数为fi(x)，(i=1，2)．对任意常数a，(0＜a＜1)
A．F2(x)+a[F2(x)-F1(x)]也是分布函数．
B．aF1(x)F2(x)也是分布函数．
C．f2(x)+a[f1(x)-f2(x)]也是概率密度函数．
D．f1(x)f2(x)也是概率密度函数．
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鸭嘴笔由笔杆和两个（）的钢片组成，两个钢片的中部有一个用来调节距离的螺钉。
A.圆形
B.矩形
C.鸭嘴形状
D.三角形状
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患者，男，48岁。肩背皮肤浅层肿块，与皮肤粘连，瘤体表面中心有黑色粗大毛孔，挤压时有臭脂浆溢出。其诊断是______
A．脂瘤
B．肉瘤
C．流痰
D．血瘤
E．筋瘤
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若语句“t=fun(fun(x,y,
A．,(a+b,a+c),x+y
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听力原文： Researchers have found that 'cool' colors, such as blues and greens, can make us feel calm and relaxed. Blue and green surroundings can also lower blood pressure, pulse rate, and breathing rate. 'Warm' colors, such as reds, yellows, and oranges, affect us differently than 'cool' colors do. 'Warm' colors can actually make us feel warmer and excited. They stimulate heartbeat, raise blood pressure, and quicken breathing. Yellow, a bright, sunny color, often makes people feel happy and more active. Yet it makes some people feel hot and restless. Red often makes people feel energetic. But not everyone feels good wearing red. If some colors can make us feel better, might certain colors also help us think better? According to a 3year study in Germany, the answer seems to be yes. Scientists studied how various colors affect school children. And they found that certain colors could raise I. Q. as much as 12 points. In the experiment, rooms with low ceilings were painted in different colors. The more popular colors were light blue, yellow, yellow-green, and orange. Less popular colors such as white, black, and brown caused a drop in I. Q. The study found that the color orange in particular improved social behavior, cheered up children's spirits and made them feel less hostile and irritable. Do people's color preferences tell us anything about their personalities? Some researchers think they do. According to these researchers, people who are more out-going usually prefer 'warm' colors. People who are quieter, less people-oriented, often prefer 'cool' colors.If you live in a room painted light blue, you may feel________.A．happy and energeticB．warm and excitedC．calm and relaxedD．hot and restless
A.B.C.D.IfE.A．happyF.warmG.calmH.hot
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安装完毕的起重机，必须各工作机构正常工作。
A . 正确
B . 错误
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当质点作圆周运动的角加速度为以下哪个值时,质点可能在逆时针运动?
A. -3rad/s^2 B. 3rad/s^2 C. 0rad/s^2
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列车运转流程为（）
A.列车出段、列车正线运营、列车入段、列车场内检修及整备作业
B.列车出段、列车入段、列车正线运营、列车场内检修及整备作业
C.列车出段、列车正线运营、列车场内检修及整备作业、列车入段
D.列车出段、列车场内检修及整备作业、列车正线运营、列车入段
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GB/T6536试验用温度计的最小分度值为（）℃。
A、0.1
B、0.5
C、1
D、2
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普通混凝土劈裂抗拉强度试验，采用150×150×150 mm3。立方体作为标准试件，每组3块。
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关于溃疡性结肠炎的叙述，不正确的是
A．男、女发病率无明显差异
B．可发生于任何年龄
C．病变主要局限于大肠黏膜和黏膜下层
D．并发结肠穿孔、肠瘘多见
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下列活动属于条件反射的是( ) A．看到酸梅时引起唾液分泌 B．食物进入口腔后引起胃液分泌 C．大量饮水后尿量增加 D．寒冷环境下皮肤血管收缩 E．炎热环境下出汗
A.看到酸梅时引起唾液分泌B.食物进入口腔后引起胃液分泌C.大量饮水后尿量增加D.寒冷环境下皮肤血管收缩
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思维导图是一种将思维形象化的工具。 (5.0分)
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（）是我国环境基本法——《环境保护法》的立法目的，也是作为环境保护法律体系中之环境单行法律规范的《环境影响评价法》的立法目的。
A．为了实施可持续发展战略
B．预防因规划实施后对环境造成不良影响
C．预防因建设项目实施后对环境造成不良影响
D．促进经济、社会和环境的协调发展
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