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SAT考试的一个主要组成部分就是SAT写作，而写作也常常是一件令人头疼的事情，尤其在文章中需要举例说明问题的时候，很多学生往往很苦恼，接下来我们来看SAT写作中常用的例证素材发明创造。 1879: Incandescent lamp In 1879, after more than 1,000 trials and $40,000, Thomas Edison introduced an inexpensive alternative to candles and gaslight: the incandescent lamp. Using carbonized filaments from cotton thread, his light bulb burned for two days. These bulbs were first installed on the steamship Columbia and have been lighting up the world ever since. 1903:First powered flight Orville Wright took off in the first powered flight in history in 1903 with the help of his brother, Wilbur. By 1905, the Wright brothers had completed the first practical airplane for public use. Since the advent of airplanes, the world has experienced a rapid merging of cultures, ideas and resources. 1908:Fords Model T At $850, the worlds first automobile proved to be an invaluable bargain for farmers and city dwellers alike. And with Henry Fords introduction of the revolutionary assembly line, the volume of sales increased dramatically, bringing the cost of the Model T, also known as the Tin Lizzie, to just $525. 1712: Newcomens steam engine Although each separate component of a modern steam engine had already been invented by the year 1712, the first person to tie all of these elements together was Thomas Newcomen, an English blacksmith. The steam engine not only provided an immense source of power and energy, but, along with James Watts improvements in 1769, also paved the way for the Industrial Revolution and the move from an agrarian society to life in a city. | 
