皮皮学，免费搜题
登录
搜题
【单选题】
子网掩码产生在A.
表示层
B.
网络层
C.
传输层
D.
会话层
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】电路中某一点的电位，零电位点选择不同时其电位值（），所以各点电位高低是相对的。
【单选题】听力原文：M: Good morning, Doctor. F: Good morning, Mr. Smith. What can I do for you? M: I feel there's something wrong with me, but I'm not sure. F: Could you explain to me more? M: I usually get a runny ...
A.
One week.
B.
One month.
C.
Two months.
D.
Half a year.
【单选题】I am not sure exactly how much money you will receive, but it will______cover your major expense.
A.
firmly
B.
roughly
C.
constantly
D.
frequently
【简答题】补全对话 A. Take this medicine three times a day. B. Can I take your temperature? C. You only got a cold. D. Open your mouth and say 'Ahh'. E. I have a lot of headaches, and I feel tired. F. You should se...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
