题干
. _______ is well known _______ Hong Kong returned to China on July st, .
A：It, that
B：As, /
C：As, a
D：It, which
答案(点此获取答案解析）
A
A：It, that
B：As, /
C：As, a
D：It, which
的焦点 
的直线交抛物线于 
两点，点 
是原点，若 
，则 
的面积为（ ）
