国家对医疗器械实行分类管理，第三类是指具有（），需要采取特别措施严格控制管理以保证其安全、有效的医疗器械。
You develop a Windows Communication Foundation (WCF) service that uses basic authentication for client credentials. This service is currently configured to use message security. The service is hosted on a server in workgroup mode.Users report that their passwords are stolen when they use public computers.You need to ensure that messages are secure and users are authenticated.You prevent the service from being called over HTTP through Microsoft Internet Information Services (IIS) configuration. What should you do next?（） [" Use the transport security mode and specify None for transport client credential type."," Use the transportWithMessageCredential security mode and specify Basic for the transport client credential type."," Use the message security mode and specify Basic for the transport client credential type."," Use the transportWithMessageCredential security mode and specify None for the transport client credential type."]
在国际贸易中，常见的计重方法有（）。 ["毛重","净重","公量","理论重量和法定重量"]
湿法炼锌
机油压力过低的原因是（）。 ["机油粘度过高","机油泵磨损","发动机转速过高","发动机温度低"]
信息系统总体规划应当包括哪些方面？
