Why will a switch never learn a broadcast address?（）A、Broadcasts only use network layer addressing.B、A broadcast frame is never forwarded by a switch.C、A broadcast address will never be the source address of a frame.D、Broadcast addresses use an incorrect

题目

Why will a switch never learn a broadcast address?（）

A、Broadcasts only use network layer addressing.
B、A broadcast frame is never forwarded by a switch.
C、A broadcast address will never be the source address of a frame.
D、Broadcast addresses use an incorrect format for the switching table.
E、Broadcast frames are never sent to switches.

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相似问题和答案

第1题：

You have overworked yourself.() a holiday to relax?

A、Why not to go on

B、Why don't go on

C、Why don't have

D、Why not go on

参考答案：D

第2题：

－ I wonder whether I could accept this discount or not. －()

A、Why don’t consult with your manager

B、Why not to consult with your manager

C、Why not consult with your manager

参考答案：C

第3题：

What is the fifth paragraph mainly about?

A. Why people become short-sighted.

B. Why natural light has a special chemical.

C. Why playing outside is good for one’s eyesight.

D. Why daylight is much brighter than indoor light.

正确答案：C

第4题：

用于脑功能检查的方法是

A.MRA

B.DWI

C.PWI

D.BOLD

E.SWI

参考答案：D

第5题：

用于动脉血管成像的检查方法是

A.MRA

B.DWI

C.PWI

D.BOLD

E.SWI

参考答案：A

第6题：

—I am not quite myself today.

—______go and see a doctor?

A. Why don't

B. Why not

C. Why you

D. Better to

正确答案：B

参考译文：——我今天感觉很不舒服。——为什么不去看医生?此题考查英语中提建议的用法；“Why don't you...”或者"Why not...”，故选B。

第7题：

显示血管畸形特别是小血管较好的检査方法是A.MRA

B.DWI

C.PWI

D.BOLD

E.SWI

用于测量细胞间隙水分子布朗运动的检査方法是A.MRA

B.DWI

C.PWI

D.BOLD

E.SWI

用于组织毛细血管水平的血流灌注情况较好的检査方法是A.MRA

B.DWI

C.PWI

D.BOLD

E.SWI

用于动脉血管成像的检査方法是A.MRA

B.DWI

C.PWI

D.BOLD

E.SWI

用于脑功能检查的方法是A.MRA

B.DWI

C.PWI

D.BOLD

E.SWI

请帮忙给出每个问题的正确答案和分析，谢谢！

问题 1 答案解析：E

问题 2 答案解析：B

问题 3 答案解析：C

问题 4 答案解析：A

问题 5 答案解析：D

第8题：

He doesn’t understand __________ so early in the morning.

(A) why to start

(B) why start

(D) why they should be start

正确答案：A

第9题：

用于组织毛细血管水平的血流灌注情况较好的检查方法是

A.MRA

B.DWI

C.PWI

D.BOLD

E.SWI

参考答案：C

第10题：

应用Gd－DTPA增强扫描常用序列是

A、T2WI

B、T2*WI

C、T1WI

D、DWI

E、SWI

参考答案：C

Why will a swi

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