题目：
以下是股票常用语的是：（）。
A.套现
B.牛市
C.停板
D.熊市
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C解析： 由图(1)知函数f(x)有三个驻点a，b，d，其导函数f’(x)有一个驻点c，如图(2)．列表讨论函数f(x)的单调性与极值，可得 x
以下是股票常用语的是：（）。 A.套现 B.牛市 C.停板 D.熊市
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题型：多项选择题
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