题目内容

Read the following texts about communication skills and answer questions 1-10.

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Read the following texts about consumer complaints and answer questions 1-10.

Read the following texts about paperless offices and answer questions 1-10.

的极值点一定是驻点.

函数取得极值处的切线（若存在）一定是水平切线.

A. 对
B. 错