数据通信中数据传输速率是最重要的性能指标之一，它指单位时间内传送的二进制位数，常用的 发布时间：2017-06-14 01:01 │ 来源：www.tikuol.com 题型：单项选择题 问题： 数据通信中数据传输速率是最重要的性能指标之一，它指单位时间内传送的二进制位数，常用的单位是A．b/sB．byte/sC．Mb/sD．kb/s
题型：单项选择题 Some pioneering work that began as an attempt to discover ways to increase production efficiency led to the founding of the human relations movement in industry and to the development of motivational skills and tools for managers. In 1927 researchers were involved in determining the optimum amount of lighting, temperature, and humidity (with lighting being considered the most important) for the assembly of electronic components at Western Electric. The researchers found that lighting had no consistent effect on production. In fact, production sometimes increased when lighting was reduced to the level of ordinary moonlight! The important part of this experiment began when two Harvard researchers, Elton Mayo and Fritz Roethlisberger, were brought in to investigate these unexpected results further. They found that workers were responding not to the level of lighting but to the fact that they were being observed by the experimenters.This phenomenon came to be known as the Hawthorne effect since the experiments were conducted at the Western Electric Hawthorne Plant. This was the first documented and widely published evidence of the psychological effects on doing work, and it led to the first serious effort aimed at examining psychological and social factors in the workplace. Further experiments were continued for five years. Generally, the researchers concluded from their experiments that economic motivation (pay) was not the sole source of productivity and, in some cases, not even the most important source. Through interviews and test results, the researchers focused on the effects of work attitudes, supervision, and the peer group and other social forces, on productivity. Their findings laid the groundwork for modem motivation theory, and the study of human factors on the job, which continues to this day in such common practices as selection and training, establishing favorable work conditions, counseling, and personnel operations. The contributions of this experiment shifted the focus of human motivation from economics to a multifaceted approach including psychological and social forces.The word "multifaceted" underlined in Paragraph 3 most probably means ______.A．versatileB．complexC．many-sidedD．multitude 查看答案
题型：单项选择题 男性，25岁，要求治疗右上前牙。2个月前，右上中切牙外伤未及时就诊。检查：右上1近中切角缺损，牙冠暗灰色，叩痛（-），电测试无活力。X线片未见根折线。该患牙的诊断应是（）A.牙髓坏死B.急性根尖周炎C.外伤冠折D.急性牙髓炎E.慢性牙髓炎 查看答案