Studies show that Americans chat on their phones for more than five hours a month, _____ Europeans.

A．as much as twice

B．twice as much as

C．as much twice as

D．as twice much as

国务院卫生行政部门对可能造成重大社会影响的突发事件，应当何时向国务院报告（）

A.1小时内

B.2小时内

C.3小时内

D.4小时内

E.立即