Howdoyoukeepcoolduri的精選

問題詳情：完形填空閱讀下列短文，掌握其大意，然後從各題所給的三個或四個選項中。Howdoyoukeepcoolduringsummer?Airconditionersorelectricfansaregoodtoolsinmodernsociety.But1 that,peoplecouldonlyusefans.   Ov...