单轨吊承载部分共有()种起吊梁。A、1 B、3 C、2 D、4 发布时间:2019-09-07 16:13 │ 来源:www.tikuol.com 题型:单项选择题 问题: 单轨吊承载部分共有()种起吊梁。A、1B、3C、2D、4
题型:单项选择题 The government officials made a quick reaction _______ the news of the earthquake. [ ]A. having heard B. heardC. being heard D. on hearing 查看答案