计算,其中Σ是曲面z=1-x2-y2(z≥0)的上侧. 发布时间:2018-05-08 20:58 │ 来源:www.tikuol.com 题型:问答题 问题: 计算,其中Σ是曲面z=1-x2-y2(z≥0)的上侧.
题型:问答题 —How can we go to the island twenty miles off the coast, sir?—I'm afraid you can't get there ________ by boat. [ ]A. more than B. rather thanC. other than D. better than 查看答案