题干
From that day on, I promised myself that wherever I am in a situation ______ I can help others the way ______this person helped me, I will follow this example.
A：which; which
B：where; that
C：that; which
D：where; where
答案(点此获取答案解析）
B
平面
, 
,点
,
,直线
,直线
,直线
,
,则下列四种位置关系中,不一定成立的是 （ ）
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