单项选择题

The Robogat is designed to pump water ______.

A．at a speed of 500 liters a minute
B．almost as fast as an airport tender
C．six times faster than an ordinary fire-engine
D．at a rate of an airport fire tender
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单项选择题
This passage suggests that a well-organized family is a family whose members ______.
A．are not psychologically withdrawn from one another
B．seldom quarrel with each other even when they disagree
C．often help each other with true love and affection
D．are exposed to the same new ideas introduced by books, radios and TV sets
单项选择题
Intermarriage and different occupations play an important role in family disorganization be- cause ______.
A．they enable the children to travel around without their parents
B．they enable the children to better understand the ways of behavior of their parents
C．they allow one to find a good job and improve one' s social status
D．they permit one to come into contact with different ways of behavior and thinking
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