36. classified

　　37. background

　　38. album

　　39. appreciation

　　40. context

　　41. implies

　　42. image

　　43. instruments

　　44. Descriptive writing in humanity, particularly in literature, is often mixed with critical writing。

　　45. It tells the reader how to do something, for example, explaining the techniques used to show a film

　　46. Authors may actually use more than one type of techniques in the given piece of informational writing