某建筑基坑采用复合土钉墙支护结构,垂直开挖,某单根预应力锚索的水平拉力标准值为185kN,其水平倾角为20°,锚孔直径为150mm,其自由段长度为6m。已知土层与土钉的极限粘结强度标准值qsk,i=50kPa。基坑安全等级为三级。试问:该预应力锚索的设计长度(mm)至少应取下列()项。()
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男,18岁,确诊为SARS。发病早期因病情比较严重,使用了人工呼吸器。在病情恢复时,停用去掉人工呼吸器,没有出现不良反映。数天后血样分析如下:[Na+]=136mmol/L,血pH=7.32,[K+]=4.5mmol/L,CO2总量=36mmol/L,[Cl-]=92mmol/L,PaCO2=9.33kPa(70mmHg)病人的阴离子隙(mmol/L)为()
A. 14.6
B. 140.5
C. 48.5
D. 232.5
E. 23.5
You are creating a Windows Communication Foundation (WCF) service. The service endpoints change frequently. On the service, you add a new ServiceDiscoveryBehavior to the Behaviors collection of the ServiceHost Description property. You need to ensure that client applications can communicate with the service and discover changes to the service endpoints. What should you do?()
Add a new ServiceDiscoveryBehavior to the Behaviors collection in the client application.
B. Add a new AnnouncementClient to the Behaviors collection in the client application.
C. Use the FindCriteria class and the UdpDiscoveryEndpoint class to set up the binding in the client application.
D. Use the DiscoveryProxy class and the EndpointDiscoveryMetadata class to set up the binding in the client application.
患者,男,28岁。患者主诉脐周痛3小时,后转移至右下腹剧烈疼痛2小时。体检示:体温39.5℃,脉搏115次/分,血压117/82mmHg;右下腹压痛、反跳痛、肌紧张,肠鸣音减弱;腰大肌试验阳性。实验室检查:WBC13.7×109/L,中性粒细胞比例0.84。根据上述病例,提示该患者阑尾位置最可能位于()。
A. 靠近闭孔内肌
B. 盲肠后位或腰大肌前方
C. 盲肠前位
D. 腰大肌后方
E. 腰大肌侧面