题目

电视机技术的发展突飞猛进，从显像管电视机到液晶电视机，当新产品问世时，技术检验部门都要经过抽样试验，即给予特定的条件，将试验的电视机从开机启动直到电视机自然老化停机，主要测试电视机的使用寿命。这种试验是（   ） A . 强化试验法 B . 优选试验法 C . 模拟试验法 D . 虚拟试验法 答案：A15．Here is an amusing story between a teacher and his student．The teacher（61）teaching（teach）math to his five-year-old student asked him，"If I give you one apple and one apple and one apple，how many apples will you have？"Within a few seconds，the student （62）replied（reply）confidently，"Four!"The teacher had expected a correct answer，（63）butshe was disppointed．She repeated the question，but the student still made the wrong answer after calculating on（64）hisfinger．The（65）disappointment（disppoint） stayed on the teacher's face．She remembered that this student liked the stawberry．She asked，"If I give you one stawberry and one stawberry and one stawberry，how many will you have？"The boy calculated carefully again，There was no press on him，but a little on his teacher（66）witha smile，the student said，"Three．"The teacher now had a（67）satisfied（satisfy）smile．So once again，she asked him，"Now，if I give you one apple and one apple and one apple，how many will you have？"The student answered，"Four!"The teacher became impatient，"Why my boy，why？"In a low voice，the young student replied，"（68）BecauseIalready have one apple in my bag．"When someone gives you an answer（69）that/whichis different from what you expet，don't think they are wrong．There may be an angle that you have not understood（70）atall．Therefore，you will have to listen and understand．