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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。

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

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

可以通过多种途径提高玻璃液体温度计的灵敏度,其中比较实用的方法是()。

A. 增大储囊的容积
B. 使用膨胀系数大的液体
C. 降低毛细管的截面面积

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