题目

如图，内壁光滑、导热良好的气缸中用活塞封闭有一定质量的理想气体．当环境温度升高时，对缸内气体说法正确的是（    ）                                                                                                                                                                                                                 　   A． 内能增加，对外做功 B．     内能不变，对外做负功 　   C． 压强增大，对外做功 D．    分子间的引力和斥力都增大                                                                                                                               答案：A

查看本题答案和解析