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3圆形有压涵管穿过路基,管长,管径,上下游水位差,管路沿程阻力系数,局部阻力系数:进口,弯管,水下出口,求通过流量?


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  • 房间内部的使用面积根据它的使用特点,可分为( )。 (A)家具或设备所占面积,使用活动面积,结构所占面积(B)使用活动面积,交通面积,管道井所占面积(C)交通面积,家具或设备所占面积,使用活动面积(D)结构所占面积,管道井所占面积,使用活动面积[参考答案:ABC]  分值:10得分: 分 系统自动批改于2020年5月17日 0点24分 建筑设计基础
  • 20、Computers can injure you. Most other injuries happen suddenly. For example,if you fall off a bike and break your arms,it happens very quickly. But computer injuries happen slowly. You probably know how to ride a bike safely. Now learn to use a computer safely. Your eyes Too much light can injure your eyes,so never sit too close to a computer screen. Your eyes should be at least 50cm from the screen. Remember to look away from it sometimes. This gives your eyes a rest. When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes. Your hands and wrists Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time,follow these three rules:1) Rest your wrists on some thing. 2) Keep your elbows (肘) at the same height as the keyboard. 3) Stop sometimes and exercise your hands,wrists and fingers in a different way. Your back Some people sit for many hours in front of a computer. If you sit in the wrong way,you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should be in front of your eyes. Your forearms,wrists,hands and the upper part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time,get up every 30 minutes and exercise your arms,legs and neck. Enjoy your computer,but use it safely.统考英语阅读理解
  • (A)(B)(C)(D)离散数学
  • 企业形象的"公众性"特点主要表现在:( )。(A) 一个企业如果己在消费者心目中形成了某种深信不疑的概念,要想改变它会比树立一个新的概念还要困难 (B) 商业道德、信誉等问题,并不会因为企业类型不同而不同 (C) 在特定消费对象中"形象"的形成也遵循共性特点 (D) 一个企业特定对象对公众舆论的影响,会争取到更多的顾客 (E) 企业自身的广告宣传(知觉)对公众舆论有重要影响广告学
  • 92、计算机系统由______两大部分组成。 A.硬件系统和软件系统 B.主机和外部设备 C.系统软件和应用软件 D.输入设备和输出设备计算机统考
  • 关于胸廓正确的是: 系统解剖学