炼钢工人通过观察炼钢炉内的颜色,就可以估计出炉内的温度,这是根据什么道理? 发布时间:2017-07-29 20:50 │ 来源:www.tikuol.com 题型:问答题 问题: 炼钢工人通过观察炼钢炉内的颜色,就可以估计出炉内的温度,这是根据什么道理?
题型:问答题 It is reported that a new racing car made from vegetables and powered by chocolate ______in May, 2009.[ ]A. will be launching B. was launched C. has been launched D. has launched 查看答案