![Sincethebeginningoftheyear,smoghascoveredpartsofNorthCh...]( "Sincethebeginningoftheyear,smoghascoveredpartsofNorthCh...")
- 问题详情：Sincethebeginningoftheyear,smoghascoveredpartsofNorthChina.InJanuary,Beijingsawonlyfivedayswithoutsmog.TherisingPM2.5readingsterrifiedmanypeople,andsomehealthexpertssaidthatwheneverthesmoggetsserious,hospitalsreceivemorepatientssufferingacute...
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