抽油泵是()的一种专用设备。A、自喷采油 B、机械采油 C、斜井采油 D、油井采油 发布时间:2019-01-29 07:46 │ 来源:www.tikuol.com 题型:单项选择题 问题: 抽油泵是()的一种专用设备。A、自喷采油B、机械采油C、斜井采油D、油井采油
题型:单项选择题 —Do you think we should accept that offer?—Yes, we should, for we _________ such bad luck up till now, and time _________ out. A.have had; is runningB.had; is runningC.have; has been runD.have had; has been run 查看答案