皮皮学，免费搜题
登录
搜题
【单选题】
IEEE802.1定义了生成树协议STP，把整个网络定义为(38)。A.
无回路的树结构
B.
有回路的树结构
C.
环形结构
D.
二叉树结构
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Man: Excuse me, madam. Do you mind if I smoke here? Woman: ______
A.
Well, yes, actually—this is a no smoking compartment.
B.
Of course not—this is a no smoking compartment.
C.
No, I'm sorry.
D.
All tight. If you just smoke one cigarette a day?
【单选题】Dear Charlie, Kindly excuse me for my not being able tosee you off at the airport this Saturday as I have promised.A major businesspartner of our company will be attending an important conference in X...
A.
thanks
B.
introduction
C.
apology
D.
invitation
【单选题】Man：Excuse me，madam．Do you mind if I smoke here? Woman：__________
A.
Well，yes，actually this is a no smoking compartment.
B.
Of course not．This iS a no smoking compartment．
C.
Yes，better not．
D.
All right，if you just smoke one cigarette a day.
【单选题】Man: Excuse me, madam. Do you mind if I smoke here? Woman: ______
A.
Well, yes, actually this is a no smoking compartment.
B.
Of course not, this is a no Smoking compartment.
C.
No, I'm sorry.
D.
All tight. If you just smoke one cigarette a day?
相关题目：