[填空题]People with disabilities comprise a large but diverse segment of the population. It is (36) ______ that over 35 million Americans have physical, mental, or other disabilities. (37) ______ half of these disabilities are “developmental,” i.e., they occur prior to the individual’s twenty-second birthday, often from (38) ______ conditions, and are severe enough to affect three or more areas of development, such as (39) ______, communication and employment. Most other disabilities are considered (40) ______, i.e., caused by outside forces. Before the 20th century, only a small (41) treatment for such conditions as stroke or spinal cord (42) not have inherently affected their life span were often medicine and social services have created a climate in which (44) Unfortunately, these basics education, and gain employment have historically been denied on the basis of disability. (45) ______. Disabled people formed grassroots coalitions to advocate their rights to integration and meaningful e