填空题

During the last few years, there has been an (36) increase in the number of shops, stores and supermarkets which provide (37) for self-service. Their general purpose is to provide goods of every (38) attractively and cleanly and in perfect condition, so that the customer can serve herself, and then pay for the goods with the least (39) . The organizers of a self-service store have their difficulties. They must display a great number of goods in a (40) space without covering up anything. They must deal with (41) foodstuffs requiring different ranges of temperature; and they must arrange a (42) flow of customers past the cash registers without (43) the operators. (44) , rotating circular shelves, islands of display stands, racks for tubed foods, and multi-tiered mobile stalls. (45) These are at zero Fahrenheit for frozen food, 28-32 degrees for meat and fish, and 40-50 degrees for dairy produce and provisions. Some of the advantages of self-service seem to be that there is no waiting to be served; there is a wide variety of choice, and it is claimed that prepacked meat and vegetables are hygienic. Shopping is said to be more "stream-lined" and more economical. (46) .