离心泵的主要性能参数有()、()、()和效率、()等。
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You are creating a Windows Communication Foundation (WCF) service. You have the following requirements: Messages must be sent over TCP The service must support transactions. Messages must be encoded using a binary encoding Messages must be secured using Windows stream-based security.You need to implement a custom binding for the service. In which order should the binding stack be configured?()
A. tcp Transport, windows Stream Security, transaction Flow, binary Message Encoding
B. transaction Flow, binary Message Encoding, windows Stream Security, tcp Transport
C. windows Stream Security, tcp Transport, binary Message Encoding, transaction Flow
D. binary Message Encoding, transaction Flow, tcp Transport, windows Stream Security
三七止血的成分是三七氨酸,遇热不稳定,止血宜用生品()
A. 正确
B. 错误
钢丝绳是()联接件,它的作用是把启闭力由卷筒传至闸门。
OSI把计算机网络在功能上分为七个层次,每层都有特定的功能,并且下一层可以利用上一层的功能提供的服务,其下三层分别是物理层、数据链路层、网络层。
A. 正确
B. 错误