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布线系统与 (36) 紧密相关。光缆是用 (37) 携带信息的。光纤有5个优点:性能好、覆盖范围广、支持更多用户、安全性好以及 (38) 。

A. 可发出有规律的电磁干扰
B. 不受电磁干扰
C. 可发出随机的电磁干扰
D. 以上答案都不对

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Given the lack of fit between gifted students and their schools, it is not surprising that such students often have little good to say about their school experience. In one study of 400 adults who had achieved distinction in all areas of life, researchers found that three-fifths of these individuals either did badly in school or were unhappy in school. Few MacArthur Prize fellows, winners of the MacArthur Award for creative accomplishment, had good things to say about their precollegiate schooling if they had not been placed in advanced programs. Anecdotal (名人轶事的) reports support this. Pablo Picasso, Charles Darwin, Mark Twain, Oliver Goldsmith, and William Butler Yeats all disliked school. So did Winston Churchill, who almost failed out of Harrow, an elite British school. About Oliver Goldsmith, one of his teachers remarked, "Never was so dull a boy." Often these children realize that they know more than their teachers, and their teachers often feel that these children are arrogant, inattentive, or unmotivated. Some of these gifted people may have done poorly in school because their gifts were not scholastic. Maybe we can account for Picasso in this way. But most fared poorly in school not because they lacked ability but because they found school unchallenging and consequently lost interest. Yeats described the lack of fit between his mind and school: "Because I had found it difficult to attend to anything less interesting than my own thoughts, I was difficult to teach." As noted earlier, gifted children of all kinds tend to be strong-willed nonconformists, Nonconformity and stubbornness (and Yeats’’s level of arrogance and self-absorption) are likely to lead to conflicts with teachers. When highly gifted students in any domain talk about what was important to the development of their abilities, they are far more likely to mention their families than their schools or teachers. A writing prodigy (神童) studied by David Feldman and Lynn Goldsmith was taught far more about writing by his journalist father than his English teacher. High-IQ children in Australia studied by Miraca Gross had much more positive feelings about their families than their schools. About half of the mathematicians studied by Benjamin Bloom had little good to say about school. They all did well in school and took honors classes when available, and some skipped grades. The root cause of many gifted students having bad memories of their school years is that ________.

A. their nonconformity brought them a lot of trouble
B. they were seldom praised by their teachers
C. school courses failed to inspire or motivate them
D. teachers were usually far stricter than their parents

男性,3岁。左侧足部内翻畸形。站立困难,跛行,左小腿肌肉萎缩,皮肤感觉正常。足背可触及距骨头,全足跖屈位,左前部内收。其余部位查体未见异常。 该患者术中应矫正的畸形不必包括

A. 足跖屈畸形
B. 足内翻畸形
C. 前足内收畸形
D. 小腿内旋畸形
E. 跟腱挛缩

男性,23岁,跑步时不慎跌伤,左肘部先着地。体格检查:体温36.5℃,心率120次/分,呼吸26次/分,血压90/60mmHg,神志尚清,痛苦貌,头偏向左侧。左锁骨皮下可触及骨擦音、骨擦感。X线检查示左锁骨粉碎性骨折。 首先应采取的措施是

A. 手法复位,“8”字绷带固定
B. 切开复位骨折内固定
C. 止痛、补充血容量
D. 尽快补充血容量,手术探查
E. 抗感染治疗

女性,21岁,学生。右髌骨周围疼痛,上下楼梯及下蹲时加重。平卧将髌骨向外侧推并屈曲膝关节时,出现脱位,患者有恐惧感并伸直膝关节。X线显示髌骨关节面发育不良。 该患者手术治疗方法不适当的是

A. 膝外侧松解术
B. 膝前内侧关节囊缩紧术
C. 半腱肌腱转位术
D. 胫骨结节移位术
E. 胫骨高位截骨术

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