题型:名词解释 Peter was so excited________he received an invitation from his friend to visit Chongqing. A.whereB.thatC.whyD.when 查看答案
题型:名词解释 钢材在运输、堆放过程中常会发生变形,钢材矫正变形方法根据矫正时的温度不同可分为热矫正和冷矫正,其中热矫正将钢材加热的温度是()A.300~500℃B.500~600℃C.700~1000℃D.1000~1300℃ 查看答案