在机械装配中,工作可靠、平稳、无噪声、油膜吸振能力强,可以承受较大冲击荷载的为()。

题型:单项选择题

问题:

在机械装配中,工作可靠、平稳、无噪声、油膜吸振能力强,可以承受较大冲击荷载的为()。

A.球形滚动轴承

B.锥形滚动轴承

C.滚针轴承

D.滑动轴承

考点:造价工程师建设工程技术与计量(安装)建设工程技术与计量(安装工程部分)
题型:单项选择题

On 14 January 2008, at a meeting of the board of directors of Yippee Ltd, it was revealed that a major competitor was likely to make a takeover bid for control of the company within the next few days. The competitor had yet to make an official takeover bid. On the same day, Bob, a director of Yippee Ltd, bought 10,000 Yippee shares in the stock market. He also told the news to his friend Marcus who then bought 20,000 Yippee shares.Required:Discuss the legal positions of Bob and Marcus under the law relating to insider trading. (10 marks)

题型:单项选择题

一质量m=2.0kg的小物块以一定的初速度冲上一倾角为37°足够长的斜面,某同学利用传感器测出了小物块冲上斜面过程中多个时刻的瞬时速度,并用计算机做出了小物块上滑过程的速度-时间图线,如图所示.(取sin37°=0.6  cos37°=0.8  g=10m/s2)求:

(1)小物块冲上斜面过程中加速度的大小;

(2)小物块与斜面间的动摩擦因数;

(3)小物块返回斜面底端时的动能.

题型:单项选择题

C++语言做了很多改进,下列描述中 _______ 使得C语言发生了质变,即从面向过程变成面向对象。

A.增加了一些新的运算符

B.允许函数重载,并允许设置默认参数

C.规定函数说明必须用原型

D.引进类和对象的概念

题型:单项选择题

怎样做才能防止二次扬尘?

题型:单项选择题

在理想气体的等温过程中,气体的比容与其绝对压力成()。

更多题库