After each container has been stuffed,responsible personnel will ensure that the doors have been securely closed and are watertight and a ______ has been placed on the container.
A.
real
B.
deal
C.
seal
D.
meal
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参考答案:
举一反三
【简答题】根据我国核行业相关规范,铀矿山井下空气中氡及氡子体导出浓度限值为:氡 kBq/ m 3 ;氡子体 μJ/m 3 。