称取0.3568g甲乙醚,用蔡塞尔法测定其含量,消耗0.1055mol/L硫代硫酸钠标准滴定溶液25.68mL,同时做空白试验,消耗硫代硫酸钠标准滴定溶液0.12mL。则该样品的含量为()。(甲乙醚的摩尔质量为60.10g/mol)。
A. 3.528%
B. 3.580%
C. 3.785%
D. 3.800%
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信托成立时,客户需要签署以下哪几份协议()。
A. 信托合同
B. 投资管理及财务顾问合同
C. 保密协议
D. 风险申明书
套管射孔完井适合于各种类型的油藏,且经济效益好。
A. 正确
B. 错误
What are the steps for configuring stateful NBAR for dynamic protocols?()
A. Use the command ip nbar protocol-discovery to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface.
B. Use the command match protocol rtp to allow identification of real-time audio and video traffic. Use thecommand ip nbar port-map to extend the NBAR functionality for well-known protocols to new port numbers.
C. Use the command match protocol to allow identification of stateful protocols. Use the command ip nbar port-map to attach the protocols to an interface.
D. Configure a traffic class. Configure a traffic policy. Attach the traffic policy to an interface.
E. Configure video streaming. Configure audio streaming. Attach the codec to an interface.
台地园是意大利的传统造园形式,其特点及造园手法可借鉴用于我国的()建园。
A. 平地
B. 山地
C. 湿地
D. 沙漠地