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【单选题】
大容量的辅助存储器常采用RAID磁盘阵列。RAID的工业标准共有6级。其中(1)是镜像磁盘阵列，具有最高的安全性；(2)是无独立 校验盘的奇偶校验码磁盘阵列；(3)是采用纠错海明码的磁盘阵列；(4)则是无冗余也无校验的磁盘阵列，它采用了数据分块技术，具有最高 的I/O性能和磁盘空间利用率，比较容易管理，但没有容错能力。 空白（4）处（）A.
RAIDO
B.
RAID1
C.
RADI5
D.
RAID3
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【简答题】Your luggage is too big,the total of its length,width and height exceeds 160cm.
【简答题】Your luggage is too big,the total of its length,width and height ______________ 160cm.
【单选题】Your luggage is too big,the total of its length,width and height ______________ 160cm.
A.
explores
B.
explains
C.
exceeds
D.
extends
【简答题】Your luggage is too big. Please do not block the passageway.
【简答题】Make up dialogues with your partner according to the following situations: Mr Wang’s luggage is too big to go into the overhead compartment.
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