顶部驱动钻井系统将钻井马达和钻井水龙头组合在一起,失去了转盘和常规水龙头的功能。 发布时间:2017-07-25 22:52 │ 来源:www.tikuol.com 题型:判断题 问题: 顶部驱动钻井系统将钻井马达和钻井水龙头组合在一起,失去了转盘和常规水龙头的功能。
题型:判断题 His writing is so confusing that it's difficult to make out ________ it is he is trying to express.[ ]A. that B. howC. who D. what 查看答案