关节活动障碍的原因中，下列哪项是错误的（）

A.骨或关节的疾病

B.肌、腱、韧等疾患

C.神经疾患

D.皮肤瘢痕挛缩

E.精神因素

The most important technological event of our time is the rise of the computer. Computers already (36) many aspects of our lives, from transportation and telecommunications to entertainment. (37) ignorant of these trends, many schools now have computers and networking capacity. To some extent, these (38) accessories have been absorbed into the life of the school, though often they simply deliver the old lessons in a more convenient and efficient format. In the future, however, education will be (39) largely around the computer. Computers will (40) a degree of individual instruction that in the past was (41) only to the rich. All students may receive a curriculum (42) to their needs, learning style, pace, and record of success with earlier materials and lessons. Computer technology puts all the (43) in the world at one’s fingers, quite literally. This is both a blessing and a curse. (44) -- now, delivery of information is instantaneous. Soon we will not even have to type in an instruction; (45) . Thus people will achieve instant "cultural literacy." Less happily, the Internet has no means of quality control; "anyone can play." Information and disinformation mingle comfortably and, as of yet, there are no reliable ways to distinguish sense from the distorted facts and downright nonsense common on the Net. (46) .