—I hear a traffic accident happened yesterday. Was it terrible ?        

—Yes. A car _____ and all the people in it were badly hurt. But luckily, none of them was killed.      [ ]

A. fell over

B. fell behind

C. fell off

D. fell down to

炎症后期用热的主要目的是( )。

A．使局部血管扩张
B．解除疼痛
C．消除水肿
D．促进炎症的消散
E．使炎症局限