磁悬浮的设计者是下面哪一位:()A、冯诺一曼B、牛顿C、诺伊麦斯特D、爱迪生 发布时间:2017-08-18 10:24 │ 来源:www.tikuol.com 题型:单项选择题 问题: 磁悬浮的设计者是下面哪一位:()A、冯诺一曼B、牛顿C、诺伊麦斯特D、爱迪生
题型:单项选择题 — I have got a headache. — No wonder. You ______ in front of that computer too long. [ ]A. work B. are working C. have been working D. worked 查看答案