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  3. The American patent system, provided for in the Constitution, was designed to encourage the creation and use of new technology.

The American patent system, provided for in the Constitution, was designed to encourage the creation and use of new technology.

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问题     The American patent system, provided for in the Constitution, was designed to encourage the creation and use of new technology. An inventor would describe the invention, both in writing and with drawings, and【B1】______the description with a model to a government official. If the invention was judged to be【B2】______and beneficial, the official would give the inventor a patent. The patent meant that for 14 years the inventor owned the new invention. Inventors could【B3】______their ideas to manufacturers or just use them themselves. The government would not【B4】______any other patent for the same idea, and the inventor could【B5】______anyone of using the patented idea with - out paying the owner of the patent for【B6】______to use it.
    A useful patent meant that the inventor could make a lot of money. In exchange for this governmental protection, the government published the patent【B7】______, which had to provide enough information so that other people could understand the invention - thus adding to the general【B8】______technological knowledge. And at the end of the 14 years, anyone could use the invention for【B9】______The idea behind the patent system was twofold: it would increase the amount of technology, by providing a way for people to make money out of new ideas, and it would make new technology widely available, by publicizing ideas that might【B10】______be kept as trade secrets.
[A]license[B]however[C]accuse[D]submit[E]convenient
[F]permission[G]enable[H]free[I]specifications[J]yield
[K]issue[L]charge[M]available[N]otherwise[O]original
【B5】
选项
答案C
解析 空格前为情态动词could，所以此处需要填入一个动词原形和后面的介词of搭配使用。句子用without引导条件——如果没有支付费并获准使用就擅自使用该专利，因为专利受法律保护，发明人有权对其进行起诉。accuse和charge都有“控告，控诉”的意思，但是用法不同，分别为accuse sb．of sth．和charge sb．with sth．，故排除charge。
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