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[主观题]
100 millirems 选择
The " __________ " dose of radiation that we receive each year is about 100 millirems;
[A] conventional
[B] common
[C] general
[D] normal
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The " __________ " dose of radiation that we receive each year is about 100 millirems;
[A] conventional
[B] common
[C] general
[D] normal