单项选择题

One significant improvement in the future car will probably be ______

A．its power source
B．its driving system
C．its monitoring system
D．its seating capacity
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单项选择题
By saying that the bomb also has a deterrent effect the spokesman means that it ______
A．will frighten away any possible intruders
B．can show the special status of its owners
C．will threaten the safety of the owners as well
D．can kill those entering others' houses by force
单项选择题
From the tone of the passage we know that the author is ______
A．doubtful about the necessity of keeping H-bombs at home for safety
B．unhappy with those who vote against the ownership of H-bombs
C．not serious about the private ownership of H-bombs
D．concerned about the spread of nuclear weapons
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