责任事故是指由于有关人员的过失所造成的人员伤亡或财产损失的事故。
参考答案：对
The Winter Olympic Games ________ in Sochi, Russia in February, 2014 was also a great party for athletes from different countries.
A．was held
B．being held
C．to be held
D．held
蛛网膜下腔出血，首选的检查方法为()
A．MRI
B．PET
C．EEG
D．CT
E．ECT
