由于市场原因致客户交易指令未能全部或者部分成交的，期货公司( )。A．应当承担赔偿

如果一个样本的数据为8，5，6，4，7，那么这个样本的方差为______．

1946年3月5日，英国前首相丘吉尔在富尔敦发表了( )，发出第一个明白无误的“冷战”信号。

A．和平演讲

B．冷战演说

C．铁幕演说

D．联合演讲

阅读理解。

     1.____  When a person does a certain thing again, he is impelled(迫使) by some unseen force to do

the same thing repeatedly; thus a habit is formed. Once a habit is formed, it is difficult, and sometimes

impossible, to get rid of. 2._____  Children often form bad habits, some of which remain with them as

long as they live. Older persons also form bad habits as long as they live. Older persons also form bad

habits, and sometimes become ruined by them. 

     3._____  Many successful men say that much of their success has something to do with certain habits

in early life, such as early rising, honesty and thoroughness.

Among the habits which children should not form are laziness, lying, stealing and so on. 4._____

Unfortunately older persons often form habits which ought to have been avoided. 

     5._____

A. There are other habits which, when formed in early life, are of great help.

B. Whether good or not habit are, they are easy to get rid of.

C. We ought to keep from all these bad habits, and try to form such habits as will prove good for ourselves and others.

D. Habits, whether good or bad, are gradually formed.

E. It is very important for us to know why we should get used to good habbits.

F. These are all easily formed habits.

G. It is therefore very important that we should pay great attention to the formation of habits.

工程设计管理模式的选择取决于建设项目业主的工程技术力量和( )。

A．资金投入量
B．所处环境
C．设计管理水平
D．管理方法

简述古希腊神话的定义。