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某井采用螺杆泵生产，泵型为GLB500―14K，转速120r／min。该井的理论排量是多少？

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客流特征包括

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轧钢生产中理想的连轧条件是（）

A. F_iV_i=F_i+1V_i+1
B. F_iV_ii+1V_i+1
C. F_iV_i>F_i+1V_i+1

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Choose the true statement regarding QoS pre-classify.（）

A. QoS pre-classify permits making QoS decisions based on elements from the unencrypted IP packet.
B. QoS pre-classify is required when encrypting voice.
C. QoS pre-classify is an advantage to Service Providers transporting encrypted packets.
D. QoS pre-classify is not designed for IPSec/GRE configurations.

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核电厂、发电厂、飞机场、港口一旦发生火灾需要专职的消防队来救援。

A. 正确
B. 错误

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