Read paragraph 11 and 12. Please look at the 1st sentence of para. 12 " And as this is true of the techniques of mankind, so it is true of mankind's spiritual resources." What does "this" and "it" refer to?
【单选题】Toyota is able to produce high-quality, well-designed cars at a lower delivered cost than any other firm in the world. This is an example of a(n) :