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  Recent research shows that listening to music improves our mental well-being and boosts our physical health in surprising and astonishing ways.  36  Here are some amazing scientifically-proven benefits of being hooked on music.   Music reduces depression   More than 350 million people suffer from depression around the world. A study by Hans Joachim Trappe in Germany demonstrated that music can benefit patients with depressive symptoms, depending on the type of music.   37    But techno and heavy metal brought people down even more. The next time you feel low, put on some cl下列各组物质中，按单质、化合物、混合物的顺序排列的是（　　）A、镁、氢氧化钙、冰水混合B、稀有气体、氯化氢气体、石灰水C、液态氧、干冰、透明的河水D、水、石灰石、生理盐水