题目

 I’m not surprised that he became a writer. Even as a child he had a(n) __________imagination.    A. clear               B. elegant                 C. funny                D. vivid 答案：D如图所示，重200N的均匀长木板AB在细绳拉力作用下保持静止．请你根据所给出的标度画出木板受到的拉力的图示，以及拉力的力臂．