2. 外语
  3. When an invention is made, the inventor has three possible courses of action opening to him: he can give the invention to the【S1

When an invention is made, the inventor has three possible courses of action opening to him: he can give the invention to the【S1

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问题     When an invention is made, the inventor has three possible
courses of action opening to him: he can give the invention to the【S1】______
world by publishing it, keep the idea secret, or patent it.
    A granted patent is the result of a bargain strike between an inventor【S2】______
and the state, by which the inventor gets a limited period of monopoly
and publishes full details of his invention to the public after that
period terminates. Only in the most exceptional circumstances the【S3】______
lifespan of a patent extended to alter this normal process of events.
Because a patent remains temporarily public after it has terminated,【S4】______
the shelves of the library attached to the patent office contain details
of literal millions of ideas that are free for anyone to use and, if older【S5】______
than half a century, sometimes even patent. Indeed, patent experts often【S6】______
advise anyone wishing to avoid the high cost of conducting a search
through lively patents that the one sure way of avoiding violation of【S7】______
any other inventor’s right is to plagiarize a dead patent. However,【S8】______
because publication of an idea in any other form permanently validates
further patents on that idea, it is traditionally safe to take ideas from
other areas of print. Much modern technological advance is based on
these presumptions of legal security.
    Anyone closely involved in patents and inventions soon learns that
most "new" ideas are, in fact, as very old as the hills. It is their reduction to【S9】______
commercial practice, either through necessity or dedication, or through
the availability of new technology, makes news and money.【S10】______
【S2】
选项
答案strike一struck
解析 strike a bargain意为“达成协议”，此处应用strike的过去分词形式struck。其引导的分词短语作后置定语，修饰a bargain。
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