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简述软件开发工具认识与描述客观系统的功能要求。

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php的快捷性：

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热电公司49i型臭氧分析仪切割头应高于监测站房顶（）m。

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You are maintaining the database of a company. The listener process， listener1， is configured for remote access. You have issued the following command： LSNRCTL>STATUS listener1 Which information will NOT be displayed when you issue the above command？（）

A. whether the password is set in the listener or a file or not
B. the number of client connections the service handler has refused
C. the information will be displayed whether the instance can accept connections or not
D. the protocol addresses on which the listener is configured to liste

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园林中碧桃多整形为自然杯状形，其3个主枝在纵向上应各间距20-30厘米。

A. 正确
B. 错误

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