考博英语

transaction, guarantees on the product or service, delivery terms, return privileges, and other factors. &*O'qOO<2  
In other words, both buyer and seller should be fully aware of all the factors that comprise the total RJDk7{(  
“package” being exchanged for the asked-for amount of money in order that they may evaluate a kl1Q:  
given price. jYAm}_?No  
04 0;`FS/[(f  
Electricity pg,
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The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and QRl+7V  
telephones that it is hard to imagine what life would be like without them. When there is a power 751Qi  
failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no Rd;t}E$  
traffic lights to guide them, and food spoils in silent refrigerators. ?@MY+r_G  
Yet, people began to understand how electricity works only a little more than two centuries ago. `]19}GK~xo  
Nature has apparently been experimenting in this field for million of years. Scientists are discovering