问答题

公司越来越多地借助高科技来保护计算机的安全。

【参考答案】

Companies are increasingly using high technology to keep com......

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问答题

20世纪被称为巨变的时代，而21世纪被称为信息时代。(refer)

单项选择题

An empty bag cannot stand upright; a debtor cannot stand upright. The phrase stand upright is used （）

A. literally of both the hag and the debtor
B. metaphorically of both the bag and the debtor
C. literally of the bag, metaphorically of the debtor
D. metaphorically of the bag, literally of the debtor