单项选择题

Which of the following is NOT suggested in the last paragraph

A．People may not see the significance of certain new technologies immediately after they appear.
B．It may take several years for people to realise the impact of new technologies on our culture.
C．New technologies are likely to make it difficult to preserve valuable information.
D．New technologies will enable us to have access to more valuable information.

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单项选择题

In the 2nd paragraph, what is compared to a black hole

A．Large swaths of digital heritage.
B．Vital cultural artifacts.
C．Important digital material.
D．The lack of information.

单项选择题

Which of the following idioms may be used by the author as a suggestion for minimizing risks

A．More haste, less speed.
B．Don't put all your eggs into one basket.
C．Don't count your chickens before they are hatched.
D．Look before you leap.