问题
单项选择题
What can cause a lack of oxygen in a chain locker（）．
A.Absorption
B.Osmosis
C.Evaporation
D.Oxidation
答案
参考答案：D
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What can cause a lack of oxygen in a chain locker（）．
A.Absorption
B.Osmosis
C.Evaporation
D.Oxidation
参考答案：D