[单选] 添加背景音乐的HTML标签是（）

在酶联免疫测定中，最常用的标记酶是（） 碱性磷酸酶。 酸性磷酸酶。 过氧化物酶。 过氧化氢酶。 乳糖酶。 医疗器械生产企业、经营企业和使用单位发现突发、群发的医疗器械不良事件，应当立即向所在地省、自治区、直辖市（）、卫生主管部门和医疗器械不良事件监测技术机构报告，并在（）小时内填写并报送《可疑医疗器械不良事件报告表》。 医疗器械生产企业、经营企业和使用单位认为必要时，可以（）报告，但是应当及时告知被越过的部门及机构。 You are implementing a Windows Communication Foundation (WCF) client application that consumes the ICatalog and lCatalog2 service interfaces.You need to ensure that the client discovers services implementing these interfaces. The services may already be online or may come online within a 30 second time limit. How should you use WCF Discovery to accomplish this?（） Create one FindCriteria object for each interface and set the Duration of each FindCriteria to 30 seconds. Call the FindAsync method of the DiscoveryClient class twice, one time for each of the FindCriteria objects, to search for the services.。 Create one FindCriteria object for each interface and set the Duration of each FindCnteria to two seconds. Create a loop that calls the Find method of the DiscoveryClient class to search for the services. Within each loop iteration, call the Find method of the DiscoveryClient class once for each of the FindCriteria objects. Run the loop until a service is found or 30 seconds pass.。 Create a single FindCriteria object and add both interfaces to its ContractTypeNames collection. Set the criteria's Duration to two seconds. Create a loop that calls the Find method of the DiscoveryClient class to search for the services. Within each loop iteration, call the Find method of the DiscoveryClient class to search for the services Run the loop until a service is found or 30 seconds pass.。 Create a single FindCritera object and add both interfaces to the ContractTypeNames collection. Set the Duration to 30 seconds and use the FindAsync method of the DiscoveryClient class to search for the services.。 婴儿语言发展四个阶段的正确表述是（）。 单字句，电报句，简单句，复合句。 单字句，多字句，简单句，复杂句。 复合句，单字句，电报句，简单句。 单字句，电报句，复合句，简单句。 添加背景音乐的HTML标签是（）