#大学英语四级模拟试题（九）2 搜索结果
the"happinessmachine"hasmanypossibilities.thomsonhasspeculatedonitsuseneardisturbedoranxiouspatientsinhospitals,andinunrulycrowds.tranquility（平静）,likepanicandviolence,maybecontagions（传染性的）.1.thetheory
