________．
Congratulations!（ ）
| A． |
Sorry for breaking the glass． |
| B． |
How are you feeling today？ |
| C． |
I was awarded first prize in the writing contest． |
| D． |
Why not take the underground to the university？ |
________．
Congratulations!（ ）
| A． |
Sorry for breaking the glass． |
| B． |
How are you feeling today？ |
| C． |
I was awarded first prize in the writing contest． |
| D． |
Why not take the underground to the university？ |
中，若
，则
为
的内角，则
的取值范围是
中，若
，则
等于
或
或
或
的一个焦点为
，则
的值是
”是“
”成立的
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