题干
The movie covers all of Chinese history. It is _________ worth seeing again.
A：mainly
B：really
C：possibly
D：hardly
答案(点此获取答案解析）
B
The movie covers all of Chinese history. It is _________ worth seeing again.
A：mainly
B：really
C：possibly
D：hardly
的焦点为
，准线为
，
为抛物线上一点，
为垂足. 如果直线
的斜率为
，那么
（ ）