轴线相交且切于同一球面的两个二次曲面,其交线为两条二次曲线。
A. 对
B. 错
两曲面立体相交,只有当两曲面立体均为可见部分时,其交线才是可见的。
A. 对
B. 错
_____ is NOT included in the modernist group.
A. Oscar Wilde
B. Virginia Woolf
C. William Butler Yeats
D. Eliot
The Canterbury Tales is a representative work of the Old English Period.
A. 对
B. 错