题目: 引起管道振动的主要原因有哪些? 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/0803/322f8e7b76cd8fd98dbf5d1d49b826e4.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:选择题 It’s the end of the month and I can hardly make ends meet. , I would buy you a good gift for your birthday.A.If anyB.If notC.If everD.If so 查看答案