[问答题]用循环结构实现下列问题:现有1020本书,第一天卖掉一半多两本,以后每天卖掉剩下的一半多两本,直到卖完为止.计算并输出卖完所需要的天数
[问答题]试述美国的SA和AS技术及对定位的影响
[判断题]按地质成因岩石可划分为岩浆岩、沉积岩、片麻岩三大类.
[填空题]埃里克森认为由遗传决定的发展顺序是遵循 的原理.
[阅读理解]Believe it or not, optical illusion (错觉)can cut highway crashes. Japan is a case in point. It has reduced automobile crashes on some roads by nearly 75 percent using a simple optical illusion. Bent stripes, called chevrons (人字形), painted on the roads make drivers think that they are driving faster than they really are, and thus drivers slow down. Now the American Automobile Association Foundation for Traffic Safety in Washington D. C. is planning to repeat Japan‘s success. Starting next year, the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway crashes. Excessive speed plays a major role in as much as one fifth of all fatal traffic accidents, according to the foundation. To help reduce those accidents, the foundation will conduct its tests in areas where speed-related hazards are the greatest―curves, exit slopes, traffic circles, and bridges. Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half. However, traffic often returns to full speed within months as drivers become used to seeing the painted bars. Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane appear to be narrower. The result is a longer lasting reduction in highway sped and the number of traffic accidents.1.The passage mainly discusses ________. A) a new way of highway speed control B) a new pattern for painting highways C) a new approach to training drivers D) a new type of optical illusion 【外语教育&网www.for68.com】2.On roads painted with chevrons, drivers tend to feel that ________. A) they should avoid speed-related hazardsB) they are driving in the wrong laneC) they should slow down their speedD) they are approaching the speed limit3.The advantage of chevrons over straight, horizontal bars is that the former ________.A) can keep drivers awakeB) can cut road accidents in halfC) will have a longer effect on driversD) will look more attractive4.The American Automobile Association Foundation for Traffic Safety plans to ________.A) try out the Japanese method in certain areasB) change the road signs across the countryC) replace straight, horizontal bars with chevronsD) repeat the Japanese road patterns5.What does the author say about straight, horizontal bars painted across roads A) They are falling out of use in the United States .B) They tend to be ignored by drivers in a short period of time.C) They are applicable only on broad roads.D) They cannot be applied successfully to traffic circles.
[问答题]完成平面体被平面截切后的水平投影并作出侧面投影.(要求写出作图步骤)
[填空题]歌曲《跳月歌》是一首长期流传的( )民歌
[判断题]杜甫认为最好的诗应当是诗思之美与形式格律之美毫发无间的融为一体.( )
[名词解释]什么是灵感和直觉
[问答题]简述简化组织结构减少管理费用的三条规则.
[填空题]若两任意事件A与B独立且BAA,则
[单选题]C.H2高速动车组网侧整流器所用功率器件是( )A. GTOB. GTRC. IGBTD. MOSF./br>E.
[名词解释]什么是实收资本
[填空题]梵,第根的代表作是___.
[名词解释]昭陵六骏
[名词解释]税法主体
[填空题]巴洛克追求不规则形式,起伏的线条和热烈的情感主要的艺术代表是( ).
[问答题]画出三棱锥的W面投影,并补全三棱锥表面上的折线FED的W面投影和H面投影.(要求写出作图步骤)
[问答题]已知平面立体的两投影,作出第三投影,并完成立体表面上的各点的三面投影.(要求写出作图步骤)
[填空题]MPG数据流结构可以分为六个层次: 、图像组层、图像层、 、宏块层和块层.
[填空题]以为通解的线性微分方程为___.答案:(1);