圆形人物
参考答案：
具有人性的深度，具有多重性格侧面，随作品发展而变化。
—My new bike rides very well though it doesn't cost much.
—Let me have a try. So _______. [ ]
A. it is
B. is it
C. does it
D. it does
阻塞发生时，气流的入口冲角为负值
