6.Raw oysters have been found to contain potentially fatal Norwalk-like viruses that hygiene officials regard as No. 1 public health enemy in the coming decade.
7.Terrorism is an outstanding public hazard in the world of today, it is the common enemy to our civilized society in all human kind and it is a malignant tumor in economic society development.
8.But in remarks meant to rebuild public support for the war, Mr Bush has made clear that he believes leaves withdrawing troops now would enbold embolden the enemy and make America more volunable vulnerable to terrorist attack.
9.In order to know the enemy's situation, we should collect information on his political, military and financial position and the state of public opinion in his territory.
