FDDI的物理层被分为（）个子层。 A.1 B.2 C.3 D.4 发布时间：2018-03-28 18:37 │ 来源：www.tikuol.com 题型：单项选择题 问题： FDDI的物理层被分为（）个子层。A.1B.2C.3D.4
题型：单项选择题 药物变态反应发生的特点和规律是A．与过敏体质密切相关；药物过敏绝大多数为后天获得B．药物过敏只发生在人群中的少数人，在人群中-般与用药剂量无关C．药物过敏状态的形成有一定的潜伏期，一般不发生于首次用药；药物过敏的再次发生有潜伏期D．过敏反应发生后，停用致敏药物，轻的反应可较快消退，一般预后良好；已致敏的患者对于该药的致敏性可持续很久，甚至终生不退E．具有类似结构的药物常町发生交叉和不交叉过敏反应 查看答案
题型：单项选择题 补全对话。（其中有两项是多余的）A: Because in spring everything comes back to life. This is a hopeful season.B: By the way, what's your favorite season? C: How many seasons are there in a year? D: I think I like spring best. E: The trees turn green and the flowers come out. What a beautiful season! F: How do you do? Maria: Jane, which season do you like best in a year? Jane: 1 Maria: Why? Jane: 2 Maria: Yes, I think so. 3 Jane: Yeah! 4 Maria: Fall is my favorite season. Jane: Why? Maria: 5 1. ______ 2.______ 3.______ 4.______ 5.______ 查看答案