316.n. an interest percentage that changes over time

　　(a) disclaimer

　　(b) adjustable rate

　　(c) license

　　(d) editor

　　317.n. demand for goods or services; rate of purchase and sale; fair

　　(a) market

　　(b) exit

　　(c) illustration

　　(d) resist

　　318.n. period; era; generation

　　(a) calculator

　　(b) age

　　(c) advance

　　(d) mail

　　319.n. knowledge obtained by doing; something that one has lived through

　　(a) treatment

　　(b) target

　　(c) aging schedule

　　(d) experience

　　320.n. piece of equipment which can be used with other machines without alternation

　　(a) addiction

　　(b) imagining

　　(c) cruise

　　(d) compatible

　　正确答案：babdd