Nearly 56 percent of Chinese believe that traffic order got even worse after tightened traffic regulations ______at the beginning of 2013.

A．have been adopted

B．were adopted

C．adopted

D．had adopted

金黄色葡萄球菌性肺炎的临床特点是()

A．刺激性咳嗽为突出表现

B．易发生心力衰竭

C．病情重死亡率高

D．易发生脓胸、肺大泡和脓气胸

E．中毒症状重