题目

完形填空 ，阅读下列短文,从每小题所给的A、B、C、D四个选项中选出一个最佳选项。 A rich man loved his little boy very much.He wanted  1  him happy all the time.So he gave him everything that he could buy with  2  .But the little boy was still  3  .Wherever he went,he always wore a frown(皱眉).And he always wished for something he did not have.The rich man didn’t know  4  to make his son happy. One day,a magician(魔术师)came and said to him,“I can make your son happy and  5  his frowns into smiles,but you must pay me a great price   6  tellin2．下列说法正确的是（　　）A．质量相同的物体，速度大的惯性大B．紫外线比红外线更容易产生显著的衍射现象C．根据麦克斯韦电磁场理论，变化的电场周围可以产生变化的磁场D．根据狭义相对论的原理，对不同的惯性系，物理规律都是一样的