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train along the line. The structure of DNA This was a discovery of Francis Crick and James Watson and published in 1953. These two scientists were the first to show that our genes consist of two spirals of DNA (called the doublehelix). This work led directly to the human genome project in 2022, which discovered the Structure of DNA. Do you know the stages every inventor must go through before they can have their invention approved? Inventing is a scientific activity and so follows similar stages to those used in scientific research. Look at the list and work out a suitable order. Applying for a patent Finding a problem Doing research Testing the solution Thinking of a creative solution Deciding on the invention Prereading – II (3m) The suitable order: Finding a problem Doing research Thinking of a creative solution Testing the solution Deciding on the invention Applying for a patent Patent office (專利局 ) plays the role of deciding what is an invention and what is not. And only inventions can get patens and so be recognized and protected. patents Reading The problem of the snakes Skim the whole passage and get the main idea: The text narrates _______________________ and presents _____________________ and applying for ________. the problem of the snakes the procedures of catching them a patent ReadingI(3m) Divide the text into four parts and work out the main idea for each paragraph. Part I Part II Part III Part IV () The discovery of the problem of the snakes. (Paras