[多选] The LAN needs are expanding at the Testking corporate office, which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the TestKing network.Which of the following are layer 1 devices that you can use?（）

You have an Exchange Server 2010 organization. You need to use Role Based Access Control （RBAC） to provide a user the ability to manage recipients in a specific organizational unit （OU）. What should you do first（）？  Create a new direct role assignment.。 Create a new management role assignment policy.。 Create a new management scope.。 Modify the default management scope.。 大环内酯类类抗生素不包括（） 泰妙菌素。 泰乐菌素。 替米考星。 红霉素。 凡是成立党的新组织，或是撤销党的原有组织，必须由（）决定。 上级党组织。 县级以上党组织。 上级党委。 上级党委书记。 ERP是建立在信息技术基础上的，整合了企业管理理念、业务流程、基础数据、人力物力、计算机硬件和软件于一体的企业资源管理系统，以实现对（）、（）、（）的一体化管理。 尸僵的法医学意义？ The LAN needs are expanding at the Testking corporate office, which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the TestKing network.Which of the following are layer 1 devices that you can use?（）