题目内容
(请给出正确答案)
[单选题]
Why do you think they had not a backup computer? 查看材
A.A.Because it was easy down.
B.B.Because it was very expensiv
C.C.Because it was not advanced enoug
D.D.Because it was not as big as the main computer.
单选题,请选择你认为正确的答案:
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