题目内容

（）强度高、耐久性和耐火性好，但其流动性差，施工相对较困难，常用于地下结构或经常受水侵蚀的砌体部位。

A. 水泥砂浆
B. 混合砂浆
C. 石灰砂浆
D. 粘土砂浆

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You are designing a Windows Azure application. The application will use a Windows Azure AppFabric Service Bus message buffer. You need to recommend an approach for ensuring that only authorized users can discover and use the message buffer. What should you recommend？（）

A. Make the message buffer discoverable to listeners and require authorization.
B. Make the message buffer discoverable to managers and do not require authorization.
C. Make the message buffer publicly discoverable. Include a Simple Web Token （SWT） in each message.
D. Make the message buffer discoverable to managers. Include a Simple Web Token （SWT） in each message.

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