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2011-09-15 14:36:00   来源：liuxuepaper.Com    双击单词自动翻译

　　(B) Adult male tamatins contribute to the care of tamarin infants.

　　(C) The social system of tamarins requires monogamous pairing.

　　(D) Male tamarin monkeys do not display ag美国GREssive behavior in the wild.

　　(E) The way the tamarins were kept in cages did not affect their mating behavior.

　　16. Twenty percent of all energy consumed in the United States is consumed by home appliances. If appliances that are twice as energy- efficient as those currently available are produced， this figure will eventually be reduced to about ten percent.The argument above requires which of the following assumptions? (A) Home-appliance usage would not increase along with the energy efficiency of the appliances.

　　(B) It would not be expensive to produce home appliances that are energyefficient.

　　(C) Home-appliance manufacturers now have the technology to produce appliances that are twice as energy-efficient as those currently available.

　　(D) The cost of energy to the consumer world rise with increases in the energy efficiency of home appliances.

　　(E) The percentage of energy consumed by home appliances will increase if existing appliances are not replaced by more energy-efficient models.