【简答题】在狭义相对论中,下列说法中哪些是正确的? (1)一切运动物体相对于观察者的速度都不能大于真空中的光速; (2)质量、长度、时间的测量结果都是随物体与观察者的相对运动状态而改变的: (3)在一惯性系中发生于同一时刻,不同地点的两个事件在其他一切惯性系中也是同时发生的; (4)惯性系中的观察者观察一个与他作匀速直线运动的时钟时,会看到这时钟比与他相对静止的相同的时钟走得慢些。
【单选题】In the last paragraph, 'that's just the way the ball bounces', probably means______.
A.
tradition offers the best choice
B.
the NBA made a mistake
C.
the ball bounces as best it can
D.
the ball bounces perfectly
【判断题】The trad e term DAT should be followed by named port of destination.
【多选题】根据 狭义相对论,下列说法中哪些是正确的?
A.
一切运动物体相对于观 测 者的速度都不能大于真空中的光速 .
B.
惯性系中的观 测 者观 测 一个与他作匀速相对运动的时钟时,会 测 到这时钟比与他相对静止的相同的时钟走得慢 .
C.
在一惯性系中发生于同一时刻 、 不同地点的两个事件 , 在其它一切惯性系中也是同时发生的 .
D.
质量、长度、时间的测量结果都是随物体与观 测 者的相对运动状态而改变的 .
【单选题】What is Dollar Cost Averaging?______.
A.
A brokerage account that gives investors cheap trades
B.
The idea that prices tend to rise over the long term
C.
A strategy of investing money on a regular basis to take advantage of market fluctuations
D.
A flat quarterly mutual fund fee averaged throughout the year
E.
Buying stocks that are below average in value
【简答题】Write a composition of no more than 300 words under the title of 'The Loss of Chinese Traditional Values.' You should include the following points in your composition. 1. The inevitability of the loss...
【判断题】分类法是指以产品的批别作为成本计算对象归集生产费用,计算产品成本的一种成本计算方法。
【单选题】There are some risks in multilateral trad,They mainly include economic risk and political risks. Economic risk do not include the risk of ( ).
A.
insolvency of the buyer
B.
failure of payment by buyer
D.
confiscation of the importer’s company
【单选题】Which one is NOT true about the building?
B.
It differs from the traditional concept of buildings.
C.
There is no difference from the images of our everyday world.
D.
The splendid spectacle can't be photoset.
【单选题】狭义相对论中,下列几种说法⑴所有惯性系对物理基本规律都是等价的.⑵在真空中,光的速度与光的频率、光源的运动状态无关.⑶在任何惯性系中,光在真空中沿任何方向的传播速率都相同.其中哪些说法是正确的?