A. NH、NP,浆叶角 B. 扭矩NH C. NH、NP D. 扭矩NP
A. Textbooks and classroom aids. B. Anticipation of problems and flexibility in dealing with them. C. Objectives of the lesson and procedures to achieve them. D. Summary and homework.
A. 黑色阴影 B. 密度均匀的阴影 C. 大小不一的云絮状阴影 D. 边缘整齐的大块状阴影 E. 整个肺野出现高密度阴影