考博英语

transaction, guarantees on the product or service, delivery terms, return privileges, and other factors. Gx|$A+U  
In other words, both buyer and seller should be fully aware of all the factors that comprise the total 05gU~6AF  
“package” being exchanged for the asked-for amount of money in order that they may evaluate a R61.!ql%w  
given price. ]!d #2(  
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Electricity }y(1mzb  
The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and cWl  
telephones that it is hard to imagine what life would be like without them. When there is a power i~
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failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no f$Nz).(  
traffic lights to guide them, and food spoils in silent refrigerators. sTP`xaY  
Yet, people began to understand how electricity works only a little more than two centuries ago. w,SOvbAxX2  
Nature has apparently been experimenting in this field for million of years. Scientists are discovering