题目:
Agro Enterprises currently uses an antiquated database system. Upgrading to a standard contemporary system would cost a moderate amount, whereas upgrading to an innovative, cutting-edge system would cost much more. A standard contemporary system is sufficiently energy-efficient that it would pay for itself in 10 years, but no sooner, as compared to the cost of keeping the current system. The annual savings in operational costs offered by the innovative system would cause such a system to pay for its purchase and installation in 5 years, but it would be no more energy-efficient than the current system. Or the company could just keep the current system. Any of the three systems would be able to function for the next 20 years.
Standard contemporary system for the option that the passage most strongly suggests is true of the standard contemporary system, and select Innovative, cutting-edge system for the option that the passage most strongly suggests is true of the innovative cutting-edge system. Make only two selections, one in each column.
选项:
A、Costs Agro the greatest total amount of money during 11 years of operation
B、Less energy-efficient than either of the other two database systems
C、The most energy-efficient of the three database systems
D、Costs Agro, on average, less per year to operate than either of the other systems
E、Costs Agro, on average, more per year to operate than either of the other systems
答案:
C D