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part one texts
¡¡unit 1
¡¡passage one: why the eyes have it?
¡¡ passage two: san francisco 1906 earthquake great register
¡¡unit 2
¡¡passage one: the development of the mobile phone
¡¡ passage two: the disadvantages of the mobile phone
¡¡unit 3
¡¡passage one: black holes on a collision course
¡¡ passage two: on mars, no one can hear you scream
¡¡unit 4
¡¡passage one: the global positioning system (gps)
¡¡ passage two: kicking the chemical habit
¡¡unit 5
¡¡passage one: citibank singapore debuts biometric fingerprint payment system
¡¡ passage two: electron flashlight for nanotechnology
¡¡unit 6
¡¡passage one: global gap analysis: leaving no species behind
¡¡ passage two: titan
¡¡unit 7
¡¡passage one: do you know the secret of migratory bird migration?
¡¡ passage two: introduction to black hole
¡¡unit 8
¡¡passage one: the great lakes
¡¡ passage two : thermal features of the yellowstone national park
¡¡unit 9
¡¡passage one: the presentation of self
¡¡ passage two: the problem of the image of man
¡¡unit 10
¡¡passage one: operational effectiveness is not strategy?
¡¡ passage two: ec technologies in asia
part two keys and explanations
part three translation for the texts