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【简答题】
将曲线 绕oz 轴旋转所得的旋转曲面的方程为 , 当 的值取 时,曲面为旋转椭球面,当 的值取 时,曲面为旋转双曲面.
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举一反三
【单选题】For anyone who is set on a career in fashion, it is not enough to have succeeded in college. The real test is whether they can survive and become established during their early 20s making a name for t...
A.
have excellent academic qualifications
B.
be able to handle business problems
C.
be well established before you are 20
D.
have taken an intensive commercial course
【单选题】According to Paragraph 1, who are primarily the readers of the Post?
A.
Businessmen.
B.
College students.
C.
Housewives.
D.
Politicians.
【简答题】People of Burlington are being disturbed by the sound of bells. Four students from Burlington College of Higher Education are in the bell tower of the church and have made up their minds to 15 the bel...
【单选题】古人云:“活到老,学到老。”对这句话的正确理解是
A.
学习是老年人的需要
B.
年龄越大的人越需要学习
C.
学习是贯穿一生的、持续的过程
D.
只有好好学习，才能长寿
【简答题】His career was not noticeably ________ by the fact that he had never been to college. A) pred B) pred C) hindered D) refrained
【简答题】Which question will be asked if the applicants once worked somewhere? The question will be 'Why did you______?'
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