一根质量为m，长度为L的均匀长方体木条放在水平桌面上，木条与桌面间的动摩擦因数为
题型：选择题
问题：
一根质量为m，长度为L的均匀长方体木条放在水平桌面上，木条与桌面间的动摩擦因数为μ现用水平力F推木条，当木条经过如图所示位置时，桌面对它的摩擦力为( )
A．μmg
B．
μmg
C．
μmg
D．以上答案都不对
题型：选择题
第二节 信息匹配(共5小题；每小题2分，满分10分)
阅读下列应用文及相关信息，并按照要求匹配信息。请在答题卡上将对应题号的相应选项字母涂黑。
Harry, Tony, Collins, Jesse和Jack 几位同学欲提高学习成绩，故针对自己的情况上网找寻适合自己的学习方法与资料。
网页上信息:
A．Study Skills Self-help Information - Virginia Tech - Articles and self-assessment tests covering scheduling and time management, memory techniques, note-taking, reading, and setting up a good studying environment.
B．Academic Tips - Helping students manage time, take better notes, study more effectively, improve memory, take tests and handle the stresses of senior life.
C．Neuromod - Online Memory Improvement Course - It is possible to improve one's memory performance in specific areas by applying memory techniques. This site explains a number of systems ranging from simple to sophisticated. The training steps are clearly laid out and in most cases online training software is provided.
D．Studying Revising Exams - One
-page summary of studying, examination, and writing techniques. A collection of articles about good study habits with how-to suggestions.E. Learning Skills - University of Victoria - Copyrighted e-books with tips on organizing notes, reading, time and study management, exam preparation and writing, writing assignments, and study strategies.
F. Study Guides - Collection of academic study guides. Topics include classroom and study preparations; studying, writing and reading skills; math and science skills; evaluating and using web content; and preparing for tests. Authored, maintained, and revised by Joe Landsberger.
现在，根据他们的实际情况，进行信息匹配。
56. Tony wants to better himself by means of taking notes, time management and so on. He also feels like solving the problem of heavy pressure in study.
57. Harry wants to improve himself through the ways of time management, memory skills etc., especially he can check himself in time and can find himself better learning surroundings..
58. Jesse will find some suggestions on
how to make notes and how to do his writing homework.
59. Collins focuses on his future exams, so he would like to get some instructions for his science study and use some materials on the Net.
60. Jack hopes to train himself systematically to keep what he learns in mind a longer time.