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【单选题】
听力原文：W: I heard on 'the radio that the storm is getting nearer. M: If the weatherman is as accurate ms usual it will probably be sunny all day. Q: What do we learn from this conversation? (18)A.
It will be sunny all day.
B.
It will be raining all day.
C.
The weatherman is usually inaccurate in his forecast.
D.
The weatherman is usually very accurate in his forecast.
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【简答题】根据投影图判断点C是否在AB直线上。(在对应投影图下方的下划线上填写“在”或“不在”) _______ _______ _______ _______
【多选题】根据投影图可知
A.
AB段在圆锥图表面是直线
B.
BC段过锥顶S点，所以在圆锥图表面是曲线
C.
AB段在圆锥图表面是曲线，侧面投影有一部分不可见
D.
BC段在圆锥图表面是直线，侧面投影不可见
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