题目

键盘按键寿命试验机可对计算机、计算器、笔记本电脑等各类橡胶、金属弹片按键作耐打击寿命测试，尤其适用于计算机键盘按键的疲劳测试。这种方法属于（ ） A . 模拟试验法 B . 强化试验法 C . 优选试验法 D . 虚拟试验法 答案：B完形填空阅读下面这篇短文，掌握大意，从各题所给的三个选项（A、B、C）中，选出可以填入相应空白处的最佳答案。 A rich man loved his little boy very much. He wanted him happy all the time. So he gave him everything that he could buy with . But the little boy was still .Where he went, he always wore a frown（皱眉）.And he always wished for something he did not have. The rich man didn't know to make his son happy.One day, a magician came and said to him, “I can make your son happy and his frowns into smiles, but you must pay me a great price telling him the secret." “All right," said the man, "No matter what you ask for, I you." The magician took the boy into a secret room. He wrote something on a piece of paper, and then gave it to the boy. There were some words on the paper, "Do one thing for someone every day. "The boy followed the and became one of boys. I think only those who are always thinking about others can be truly happy.1.A. to keep B. to get C. to make 2.A. money B. food C. time 3.A. relaxed B. unhappy C. angry 4.A. why B. how C. what 5.A. turn B. come C. put 6.A. on B. for C. at 7.A. will give B. will ask C. will answer 8.A. boring B. bad C. kind 9.A. advice B. medicine C. book10.A. happier B. the happiest C. happy