【简答题】He always to work by bike when he was in Shanghai. (go)
【简答题】He always ( go ) to work by car.
【简答题】Every morning Tom goes to work by train. He has a long way to go. So he always buys a newspaper. It helps him to spend the time on the train. Tom likes sport very much. One morning on the train he is ...
【简答题】Every morning Jim goes to work by train. He has a long way go to. So he always buys a newspaper. It helps Jim to spend(度过) the time on the train. Jim likes sport very much. One morning on the train he...
【单选题】在资金时间价值计算中,下面表达正确的是( )。
A.
P 一定, n 相同, i 越大, F 越大
B.
P 一定, n 相同, i 越大, F 越小
C.
P 一定, i 相同, n 越大, A 越大
D.
F 一定, i 相同, n 越大, A 越大
【简答题】证明,若对于函数f(x)(-∞<x<+∞),等式f(x+T)=kf(x)成立,k与T为正数,则f(x)=a x φ(x),a为正常数,φ(x)是以T为周期的周期函数
【单选题】下面时间表达正确的是:
A.
Il est vingt et un heures.
B.
Il est vingt et une heures.
C.
Il est quatre heures et cinq.
D.
Elle est seize heures.
【简答题】X(t)为一随机过程,a为常数,试以X(t)的自相关函数表出随机过程 y(t)=X(t+a)一X(t) 的自相关函数.
【多选题】下面表达正确的是( )。
A.
统计数据按计量尺度分为:分类数据、顺序数据和数值型数据
D.
统计数据按数据来源分为:截面数据和时间序列数据
【单选题】以下关于书面要约的生效时间表述正确的是( )