What are the differences between middle school life and college life?
A. Living with others.
B. Taking care of yourself.
C. Handling your own finances.
D. Making your own decisions.
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In this lecture, it is said that spring is the season of ________.
In this lecture, it is said that winter is the season of ________.
【单选题】物体在W面上反映的方向是( )。
A. 上下、左右
B. 上下、前后
C. 前后、左右
【单选题】当平面垂直于H面时,在H面中的投影具有( )。
A. 实形性
B. 积聚性
C. 类似性