In the worst-affected regions, many areas remain in chaos(混乱), with roads inaccessible, public transportation at a total stop and power and telecommunication networks completely ______.

A．out of service

B．out of place

C．out of control

D．out of sight

右前斜位片上心脏前缘自上而下依次为()

A．左心房、左心室

B．右心房、右心室

C．左心房、右心室

D．右心室、左心室

E．左心室、右心房