下列选择中不是磁盘阵列基本级别的是()
A.RAID 0
B.RAID 0+1
C.RAID 0+5
D.RAID 7
参考答案:B, C, D
After the war, a new school building was put up ______ there had once been a theatre.[ ]
A. that
B. where
C. which
D. in which
下列函数不可积的是
A.(A) f(x)=xa,x∈[0,1],a>0.
B.(B) x∈[0,2].
C.(C) x∈[-1,1].
D.(D) x∈[0,1].