第9题:[单选题] 假设有四条流量A.b、c、d分别为100M.端⼝总带宽为 200M,发⽣了流量拥塞.进⾏拥塞管理.流量A.b、csd同属于WFQ队列调度. 权重⽐为 1:2:3:4.则四条流量⼤⼩约为 A. 流A.b、c、d 分别通过 20M、40M、60M、80M B. 流A.b、c、d 分别通过 100M、100M、0M、0M C. 流A.b、c、d 分别通过 80M、60M、40M、20M D. 由于拥塞导致流量全部丢弃 参考答案:A
第21题: [单项选择]— Did you come to the museum by bike yesterday —No. Two metres of snow fell during the night. As a result, several main roads ______. A. were blocked B. had been blocked C. were being blocked D. have been blocked 参考答案:A 答案解析:[解题指要] 该题测试动词时态以及语态的用法。题中Did you come…中的Did是关键词。 As a result 指当时的“结果是……”,故选用一般过去时配合。B选项had been bloc