单项选择题

Having read the last paragraph, we can conclude that ______.

A．pride goes before a fall
B．practice makes perfect
C．no pains, no gains
D．failure is the mother of success
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单项选择题
Today the electronic computer is used in solving mathematical problems having to do with weather forecasting and putting satellite into orbit(轨道)．
A．今天电子计算机应用于解决一些数学问题，这些问题不得不处理天气预报和把卫星送入轨道。
B．今天电子计算机被用于解决数学问题，这些问题与天气预报和把卫星送入轨道有关。
C．今天电子计算机不得不被用于解决天气预报和把卫星送人轨道一类的数学问题
D．今天电子计算机利用解决数学问题的方法处理天气预报和把卫星送人轨道等问题。
单项选择题
The whole passage deals with ______.
A．social education
B．school education
C．family education
D．pre-school education
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