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【多选题】
关于体胀系数的描述，正确的是：A.
含义为：压力不变时，温度每上升1℃对应比体积的变化量。
B.
单位是1/K。
C.
会影响自然对流换热。
D.
对于各种流体，体膨胀系数约为1/T。
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C.
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A.
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C.
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D.
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A.
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B.
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A.
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B.
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C.
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D.
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