[填空题]溢流阀通常并接在液压泵的出口,用来保证液压系统的出口压力恒定时称为 ___ ;用来限制系统压力的最大值称为 ___ ;还可以在执行元件不工作时使液压泵 ___ .
[单选题]―How much is the T-shirt ___________? ―65 dollars.A、 worthB、 costC、 worthyD、 paid
[单选题]反映一个测验工具的正确性是指该测验的 ( ) A、 效度 B、 信度 C、 样本 D、 常模
[填空题]一项600万元的借款,借款期3年,年利率为8%,若每半年复利一次,年实际利率会高出名义利率( ).
[问答题]中国政府为推动建立和平、稳定、公正合理的国际新秩序,大力倡导的新安全观是 .
[填空题]梁的内力正负号规定弯矩使梁_____________为正.
[判断题]当圆截面杆受扭时,圆轴横截面上任意点切应力的大小与点到圆心的距离成反比,方向垂直于半径.( )
[单选题]设C.正向圆周,则∮dz/z(z-1)=____A. -2πi B. 0 C. 2πi D. i
[单选题]个人理想与社会理想的关系实质上反映了( )A、个人与社会的关系B、人与自然的关系C、个人与他人的关系D、个体身与心的关系
[单选题]如图 5所示结构,下列受力分析图正确的是____. A、 B、 C、D、
[问答题]Marketing Manager(营销部经理)答案 1Training Officer(培训主管)答案 2Engineer(工程师)答案 3Production Manager(生产部经理)答案 4Purchasing Officer(采购部经理)答案 5Accountant(会计)答案 6President(总裁)答案 7Quality Controller(质检员)
[判断题]私有财产的出现是借贷关系赖以存在的前提条件.
[多选题]有利于卤烃发生消除反应的条件是( ). A.升高温度 B.强极性溶液 C.强碱溶液 D.弱极性溶液
[单选题]鸡蛋白溶液与茚三酮试剂有显色反应,说明鸡蛋白结构中 A.游离氨基 B.芳环 C.肽键 D.酚羟基
[问答题]避雷器的作用是什么
[阅读理解]A 4 year Kid, who does not know what an Email or a Chat App is, prays to God: “Hey, Lord, Please make me a smartphone”. This young kid is asking such a wish from God, because he sees that his parents at home are completely glued to this magical device called smartphone and has no time to look up at him. The smartphone is getting more attention in the house than the child. His parents are present there physically, but their minds are somewhere else.It’s so true that this device has become an inseparable part of our day to day life, and we are addicted to it. We will start feeling restless if we do not look to our phone after a few minutes. We react faster to a phone beep or a message compared to a call by a family member from a different room. We all need to come out of this head-down syndrome. We all need to connect and communicate in real world. We need to put this technology to good use and not become a slave. So what shall we do? It’s simple: the solution is called “digital break”. This means, when you return home from work, you simply turn off or mute all your digital devices for a few hours every day, or at least once in a while. What do you do then? You can share your time with the family, chatting with your wife or husband, playing games with your kids, doing things with other family members, etc. in real life. You will soon realize the world outside the smartphone is much more enjoyable1. The kid is 5 years old. 2. The kid asked God for a smartphone. 3. Smartphones have become an inseparable part of our daily life. 4. We all need to connect and communicate in virtual world. 5. The only solution to the head-down syndrome is called “digital break.
[名词解释]石门:
[单选题]当视线倾斜进行视距测量时,水平距离的计算公式是( ).A.D.C.nB.D=cosnKC.D=aKn2 cosD.以上都不对
[单选题]递名片时,下面做法错误的是 A. 名片正面朝向接受方 B. 双手拿着名片两个角 C. 右手递名片 D. 左手拿着名片上角 E. 面带微笑
[问答题]单个仪器的绘制应注意哪些问题
[名词解释]什么是跌水