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Cet-4-1.15-Exercise 01That sounds like a bad deal for the power company, but it’s not. Solar homes produce the most power on the hot sunny afternoons when everyone rushes home to turn up the air conditioner. “It helps us lower usage at peak power times,” says solar expert Mike Keesee. “That lets us avoid building costly plants or buying expensive power at peak usage time.” What does the “net metering” practice mean to the power company?
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Cet-4-1.15-Exercise 02This comfortable cycle, in which the rhythms of the day helped shape the rhythms of the meals, gave rise to the custom of the large midday meal, eaten with the extended family. “Meal are the foundation of the family,” says Carole Counihan, a professor at Millersville University in Pennsylvania, “so there was a very important interconnection between eating together” and strengthening family ties. Since industrialization, maintaining such a slow cultural metabolism has been much harder, with the long midday meal shrinking to whatever could be stuffed into a lunch bucket or bought at a food stand. Certainly, there were benefits. Modern techniques for producing and shipping food led to greater variety and quantity, including a tremendous increase in the amount of animal protein and dairy products available, making us more vigorous than our ancestors. What does “cultural metabolism” refer to?
求异心理可以通过（）等方面表现出来。
人类满足自我修饰的本能从封建社会就开始了。
公路工程基本建设是通过（ ）、设计、施工以及有关的经济活动来实现的。
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