The industrial __________ of the late 18th century made possible the mass production of goods, __________ creating economies of scale which changed the economy and society in ways that nobody could _______________ at the time.
【单选题】Which word is the most important one in the following paragraph? There is an old joke among pilots (飞行员)that says the ideal flight crew(机组成员) is a computer , a pilot and a dog. The computer’s job is t...