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【多选题】
关于晶界扩散与体扩散,以下说法正确的是A.
晶界扩散激活能低，因此作用总是大于体扩散
B.
晶界扩散激活能低，但只有晶粒尺寸小于1 μ m时其作用才比体扩散大
C.
晶粒尺寸小到纳米晶时，晶界扩散的贡献占有绝对优势
D.
晶界扩散系数与晶内扩散系数的差异随着温度的升高而减小
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A.
drink
B.
B .drinks
C.
would drink
D.
will drink
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