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【多选题】
( 多选 ) 对于分子动理论和物体内能的理解,下列说法正确的是 ( )A.
．温度高的物体内能不一定大，但分子平均动能一定大
B.
．外界对物体做功，物体内能一定增加
C.
．温度越高，布朗运动越显著
D.
．当分子间的距离增大时，分子间作用力就一直减小
E.
．当分子间作用力表现为斥力时，随分子间距离的减小分子势能增大
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