[单项选择]

A granted patent is the result of a bargain struck between an inventor and the state, by which the inventor gets a limited period of monopoly and publishes full details of his invention to the public after the period terminates.
Only in the most exceptional circumstances is the life-span of a patent extended to alter this normal process of events.
The longest extension ever granted was to George Valensi. His 1939 patent for color TV receiver circuitry was extended until 1971 because for most of the patent’s normal life there was no hope of reward for’ the invention.
Because a patent remains permanently public after it has terminated, the shelves of the library attached to the patent office contain details of literally millions of ideas that are free for anyone to use and, if older than half a century, sometimes even re-patent. Indeed, patent experts often advise anyone wishing to avoid the high cost of conducting a search through live patents t
A. the use of patents
B. the access to patents
C. an approach to patents
D. the application for patents

[单项选择]

A granted patent is the result of a bargain struck between an inventor and the state, by which the inventor gets a limited period of monopoly and publishes full details of his invention to the public after the period terminates.
Only in the most exceptional circumstances is the life-span of a patent extended to alter this normal process of events.
The longest extension ever granted was to George Valensi. His 1939 patent for color TV receiver circuitry was extended until 1971 because for most of the patent’s normal life there was no hope of reward for’ the invention.
Because a patent remains permanently public after it has terminated, the shelves of the library attached to the patent office contain details of literally millions of ideas that are free for anyone to use and, if older than half a century, sometimes even re-patent. Indeed, patent experts often advise anyone wishing to avoid the high cost of conducting a search through live patents t
A. A patent holder must publicize the details of his invention when its legal period is over.
B. When a patent becomes out of effect, it can be re-patented or extended if necessary.
C. It is necessary for an inventor to apply for a patent before he makes his invention public.
D. One can get all the details of a patented invention from a library attached to the patent offic

[单项选择]According to the author, compulsive bargain hunters are in constant search of the lowest possible price______.


A. because they want to save money to help their budgets
B. because they can openly boast of their triumph over others in getting things for less money
C. and will not have money problems if they can keep to their bud gets
D. but they seldom admit they feel satisfied if they can get things for less money than others

[单项选择]According to the writer, compulsive bargain hunters are in constant search of the lowest possible prices ______.


A. because they want to save money to help their budgets
B. because they can openly boast of their triumph over others in getting things for less
C. and will not have money problems if they can keep to their budgets
D. but they seldom admit they feel satisfied if they can get things for less than others

[单项选择]According to time writer, compulsive bargain hunters ______.


A. want to save money to help their budgets
B. can boast of their triumph over others in getting things for less
C. will not have money problems if they can keep to their budgets
D. seldom admit they feel satisfied if they can get things for less than others

[单项选择]I was most favorably struck by the assurance with which the boy answered all my questions.
A. insurance
B. confidence
C. reluctance
D. independence