A-A+
It was the first time that such a ________ had
问题详情
It was the first time that such a ________ had to be taken at a British nuclear power station.
A．presentation
B．precaution
C．preparation
D．prediction 请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
考点：
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