The girls in this sixth grade class in East Palo Alto, California, all have the same access to computers as boys. But researchers say, by the time they get to high school, they are victims of what the researchers call a major new gender (性别) gap in technology. Janice Weinman of the American Association of University Women says, "Girls tend to be less comfortable than boys with the computer. They use it more for word processing rather than for problem solving, rather than to discover new ways in which to understand information." After re-examining a thousand studies, the American Association of University Women researchers found that girls make up only a small percentage of students in computer science classes. Girls consistently rate themselves significantly lower than boys in their ability and confidence in using computers. And they use computers less often than boys outside the classroom. An instructor of a computer lab says he’’s already noticed some differences. Charles Cheadle of Cesar Chavez School says, "Boys are not so afraid they might do something that will harm the computer, whereas girls are afraid they might break it somehow." Six years ago, the software company Purple Moon noticed that girls’’ computer usage was falling behind boys. Karen Gould says, "The number one reason girls told us they don’’t like computer games is not that they’’re too violent, or too competitive. Girls just said they’’re incredibly boring." Purple Monn says it found what girls want, characters they can relate to and story lines relative to what’’s going on in their own lives. Karen Gould of Purple Moon Software says, "What we definitely found from girls is that there is no intrinsic (固有的) reason why they wouldn’’t want to play on a computer; it was just a content thing." The sponsor of the study says it all boils down to this: the technology gender gap that separates the girls from the boys must be closed if women are to compete effectively with men in the 21st century. The gender gap needs to be closed because______.
A. it isn’t fair that boys are allowed to use computers all the time
B. there isn’t enough money for upgrading computers
C. most of the causes may boil down to a question of money
D. the ability to use computers is important in today’s world
实验室观察某疗法对移植性肿瘤的疗效,以生存日数作为分析指标,实验组观察 10例,秩次和为170;对照组观察12例,秩次和为83。欲比较两组生存日数有无差别,进行秩和检验。 编秩次时,若遇实测值相同,但分别位于两组,则应
A. 依顺序编秩
B. 取其平均秩次
C. 以实测值作为秩次
D. 将原数据合并作为新数据编秩次
E. 弃去不计并从n中减去相同值的个数