因特网也称(),是当今世界上最大的国际性计算机因特网络,是广域网的一种。
A.Extranet
B.Intranet
C.Uninet
D.Internet
参考答案:D
一Sorry for being late again.
一______ here on time next time, or you'll be punished. [ ]
A. Come
B. Coming
C. To come
D. Came
设n阶矩阵A非奇异(n≥2),A*是矩阵A的伴随矩阵,则()。
A.(A*)*=|A|n-1A
B.(A*)*=|A|n+1A
C.(A*)*=|A|n-2A
D.(A*)*=|A|n+2A