题目

Everyone knows hand-washing is important. But a new study shows how washing your hands often, and at the right time, can have an effect on your family’s risk(危险) for getting sick. Most studies on hand-washing focus on medical and food service workers. But washing hands at home is a way to stop viruses 病毒from spreading. Several studies show hands are the single most important way for all types of infections. Even though most people know to wash their hands after using the toilet.Researchers found 83 percent of virus was on the surface of bathroom, living room and kitchen. Another stud下列条约中哪一些包含有损害中国权益的条款？①《四国条约》 ②《九国公约》 ③《凡尔赛和约》 ④《限制海军军备条约》A．①③ B．②④C．②③D．①④