在网络信息传播过程中，一般需要一个（），负责向原节点和目的地节点进行秘密信息分发，也可起到仲裁的作用。 ["发送方","可信的第三方","接收方","安全消息"]
霉菌污染饲料的危害主要有？
You work as an application developer at Certkiller .com. Certkiller .com has asked you to develop an application allows administrators to control Windows services dynamically without using the Services MMC. You start by creating a class named LocalServiceController. You need to add the correct code to the LocalServiceController class to ensure that administrators are able to start local Windows services.What code should you use？（） ["A","B","C","D"]
在预制外挂墙板施工中，浇筑混凝土，分层振捣时振动棒必须进入下一层混凝土（），使上下两层充分结合密实。 ["A.20-50mm ","B.20-70mm ","C.50-80mm ","D.50-100mm"]
科学观察
一夫一妻制
