【简答题】 What is a coronavirus? Coronaviruses are a family of viruses that range from the common cold to MERS coronavirus, which is Middle East Respiratory Syndrome coronavirus and SARS, Severe Acute Respira...
【简答题】C Scientists say Severe Acute Respiratory Syndrome (SARS) is caused by a new virus from the family of corona viruses ( 冠状病毒 ), which also causes the common cold. WHAT ARE THE SYMPTOMS? The World Healt...