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问题：
[多选题]测（）等项目时，采样时水样必须注满容器，上部不留空间，并有水封口。
A、油类
B、生化需氧量
C、有机污染物
D、DO
参考答案：
B@#@C@#@D
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- ● 测（）等项目时，采样时水样必须注满容器，上部不留空间，并有水封口。
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