The answer is 19, a; 20、D； Personally, I think that the economies of major capitalist countries should continue to grow in the 1950s and 1960s. It is the influence of the third scientific and technological revolution that should promote the multipolarization of the world pattern, not the influence of the previous two scientific and technological revolutions. Globalization is the development trend of the world economy today. In the 1950s and 1960s, the economies of major capitalist countries did not enter the era of globalization, so 19 you can't choose D. And because three scientific and technological revolutions have changed people's lifestyles, this time it is their similarity, so you can't choose B for 20 questions.