【单选题】【消耗次数：1】
平面立体截交线的空间形状是（ ）。
①
直线围成的封闭多边形
②
曲线围成的封闭平面图形
③
直线和曲线围成的封闭空间图形
④
不确定
参考答案：
复制
纠错
相关题目
【简答题】
用平面切割立体，平面与立体表面的交线称为，该平面为，由截交线围成的平面图形称为。[填空(1)]
【简答题】
表面为曲面或曲面与平面所围成的立体称为。[填空(1)]
【单选题】
直线平行于投影面，其投影反映直线的实长；平面图形平行于投影面，其投影反映平面图形的实形。是正投影法的基本性质中的（ ）。
①
类似性
②
平行性
③
从属性
④
实形性
随机题目
【单选题】
No aspect of life in the Twenties has been more commented upon and sensationally romanticized than _________.
①
the native Fourth-of-July bombast
②
the rejection of Victorian gentility
③
the expatriation of the true intellectuals
④
The so-called Revolt of the Younger Generation
【单选题】
“The Sad Young Men” actually refers to _________.
①
the lost generation
②
the angry young men
③
Beat generation
④
the war profiteers
【单选题】
The young men began to enlist for ________.
①
fun in the war
②
the war before it was too late
③
the democracy before the war ended
④
the Victorian gentility after the war
【单选题】
The Sad Young Men included a group of young intellectuals except ________.
①
Hemingway and Dos Passos
②
Rod W. Horton and Herbert W. Edwards
③
F. Scott Fitzgerald and Eugene O’Neill
④
Ezra Pound, T. S. Eliot and E. E. Cummings
【单选题】
invective
①
beautiful words
②
facial expressions
③
convincing speech
④
abusive language
【单选题】
inaugural
①
holy and sacred place in a church
②
formal speech made by a person on taking office
③
shelter from trouble, danger
④
talk for the purpose of teaching
【单选题】
asunder
①
from below
②
apart in direction or position
③
in or to a low place
④
from an upright position