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【简答题】
$\lim_{x\to \frac{\pi }{4}} \, \frac{\tan (x)-1}{x-\frac{\pi }{4}}$__
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【多选题】A node in a red-balck tree could be红黑树节点的颜色有
A.
red 红
B.
black 黑
C.
yellow 黄
D.
blue 蓝
E.
green 绿
F.
purple 紫
【单选题】What does “turn out” imply?
A.
The reason for doing something.
B.
Something happens in that way or has the result the consequence of something.
C.
The potential risk of doing something.
D.
The original plan of doing something.