系统开发的经验表明，系统出现的错误中60%～80%来源于______。 发布时间：2017-07-08 15:51 │ 来源：www.tikuol.com 题型：填空题 问题： 系统开发的经验表明，系统出现的错误中60%～80%来源于______。
题型：填空题 短文改错此题要求改正所给短文中的错误如有错误(每行只有一个错误), 则按下列情况改正:此行多一个词:把多余的词用斜线(\)划掉, 在该行下边横线上写出该词, 并也用斜线划掉。此行缺一个词:在缺词处加一个漏字符号(∧), 在该行下边横线上写出该加的词。此行错一个词:在错的词下划一横线, 在该行下边横线上写出改正后的词。注意:原行没有错的不要改.I still remember how nervous I am on my first day in the new school three years ago, while I found it difficult to follow my teacher in the first English class. The teacherspoke English throughout the class, that was totallydifferent from the lesson I have before.In the morning class a next day, the English teacher came to me while I was reading the text loud like otherstudents. After listening to her for a while, she gave me a big smile and said she liked my voice very much. The smile shone on thewhole day and the following day. A week later on, I volunteered to take charge of the English study in my class. Thanks to the comforted smile, I began to feel confident from then on. 1. _____2. _____3._____4._____5._____6._____7._____8._____9._____10._____ 查看答案
题型：填空题 煅法可使质地坚硬的矿物、化石类药物达到质地酥脆，其主要原因是（）A.使药物色泽发生了变化B.使药物失去了结晶水C.清除了药物的杂质D.使药物不同组分在不同方向胀缩的比例产生差异E.产生了新成分 查看答案