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（请给出正确答案）
How often are IS－IS Hello packets transmitted?()
A. 3 seconds for DIS; 9 seconds for non-DIS
B. 9 seconds for DIS; 3 seconds for non-DIS
C. 10 seconds for DIS; 3 seconds for non-DIS
D. 10 seconds for all routers
参考答案
更多 “ How often are IS－IS Hello packets transmitted?() A. 3 seconds for DIS; 9 seconds for non-DISB. 9 seconds for DIS; 3 seconds for non-DISC. 10 seconds for DIS; 3 seconds for non-DISD. 10 seconds for all routers ” 相关考题
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Somediseasesare_____bycertainwateranimals.A)transplantedB)transformedC)transportedD)transmitted
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— Hello, Sally. How’s everything? —().
A、Good for youB、Oh, I agreeC、That’s rightD、Just so-so
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Tony, a student ( ) from New York, received warm welcome from his new classmates and teacher.
A、transformedB、transplantedC、transferredD、transmitted
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CCTV programs are _____ by satellite to the remotest areas in the country.[A] transferred[B] transported[C] transformed[D] transmitted
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关于数据封装的顺序()是正确的。
A.DatA.segments-packets-frames-bitsB.DatA.packets-segments-frames-bitsC.DatA.frames-segments-packets-bitsD.DatA.segments-frames-packets-bits
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根据提供的信息和语言素材设计教学方案，用英文作答。
设计任务：请阅读下面学生信息和语言素材，设计20分钟的英语听说教学方案。教案没有固定格式．但须包含下列要点：
·teaching objectives
·teaching contents
·key and difficult points
·major steps and time allocation
·activities and justifications
教学时间：20分钟
学生概况：某城镇普通中学初中一年级第二学期学生，班级人数40人。多数学生已经达到《义务教育英语课程标准(2011年版)》二级水平。学生课堂参与积极性一般。
语言素材：
Conversation 1
Tom:Hey,Peter．
Peter:Hi,Tom．
Tom:How′s the weather down there in Shanghai?
Peter:It′s cloudy．How′s the weather in Moscow?
Tom:It′s snowing right now．
Conversation 2
Peter:Hi,Aunt Sally．
Aunt Sally:Hello,Peter．
Peter:How′s the weather in Boston?
Aunt Sally:Oh,it′s windy．
Conversation 3
Peter:So,how′s the weather in Beijing?
Julie:It′s sunny．
Conversation 4
Peter:Hi,Uncle Bill．
Uncle Bill:Hello,Peter．
Peter:How′s the weather in Toronto?
Uncle Bill:It′s raining,as usual!
考题
CCTV programs are（ ）by satellite to the remotest areas in the country.A.transferred
B.transported
C.transformed
D.transmitted
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