填空题

The Johnstown flood is described as an example of a disaster that resulted from the combination ofand .

【参考答案】

too much rain / poor construction and management

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The second part of the flood, carrying people, houses, and other things with it, moved swiftly to a bridge that crossed the valley.

填空题

Few people believed the dam had been burst because there had been too many false alarms.

The Johnstown flood is described as an example of a disaster that resulted from the combination of______and ______.