【单选题】Maintenance activities include(74)。 ①making enhancements to software products ②developing a new software product ③correcting problems ④adapting products to new environments
【单选题】While the percentage of urban residents is higher in relatively developed countries, developing countries have an increasing number of very large urban settlements. In 1950, only three of the ten larg...
A.
Adequate job opportunities.
B.
Better public facilities.
C.
Very poor economic conditions in rural settlements.