同一正截面上的实际线的轮廓形状所允许的变动全量称为（）。
A.圆度
B.圆柱度
C.面轮廓度
D.线轮廓度
参考答案：D
When we got to the cinema, _____ a queue outside. _____ a very long queue, so we decided not to wait there. [ ]
A. there is; It is
B. there was; It was
C. it was; There was
D. there is; It is
在非冷凝模式下操作时，循环气的显热是主要的撤热方式。
