在多级螺旋模型中，染色体的二级结构是（）
A. 核小体
B. 螺线管
C. 超螺线管
D. 染色单体
E. 以上都不是
WhichstatementmostaccuratelydescribestheaccountplanningservicecomponentinthepreparephaseforCiscoUnifiedCommunications（）
A. Itperformsadetailedfinancialanalysis，includingcurrentphonenetworkcosts，training，andreturnofinvestment.
B. Itresearchesuniquechallengesandconductscompetitiveanalysistodetermineaverticalapproachandstrategy.
C. Itidentifiesthekeyplayers，high-levelsolutionrequirements，timelines，andscopeoftheopportunity.
D. Itprovidesthepartnerwithinformationregardingcustomeracceptanceofthenewsolution.
HowisSNCPandMS-SPRingtrafficreroutedduringaprotectionswitchwhenacompletefibercablecutoccurs？（）
A. SNCPtrafficisswitchedfromthefirstnodethatrecievestheAIS.MS-SPRingtrafficisreroutedfromthefirstinthering.
B. SNCPtrafficisselectedatthedestinationnodeinthering.MS-SPRingisreroutedfromtheoriginatingnodeinthering.
C. SNCPtrafficisreroutedfromtheoriginatingnodeinthering.MS-SPRingtrafficisreroutedfromtheoriginatingnodeinthering.
D. SNCPtrafficisselectedatthedestinationnodeinthering.MS-SPRingtrafficisreroutedfromthelastreachablenodeinthering.
下列不属于内膜系统的细胞器是（）
A. 核糖体
B. 内质网
C. 溶酶体
D. 过氧化物酶体
E. 分泌小泡
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