问题
单项选择题
长期保管的钢材，可以采用（）的方法使其与外界空气隔绝。
A、刷漆
B、涂油
C、密封
D、放入库内
答案
参考答案：C
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长期保管的钢材，可以采用（）的方法使其与外界空气隔绝。
A、刷漆
B、涂油
C、密封
D、放入库内
参考答案：C
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