工作时，发动机的冷却液是热的并有压力，所有通往散热器或发动机的管路都有水或蒸气，碰上都会造成（）。
参考答案：严重烧伤
On turning on the computer, .
A．Mum told me to have supper.
B．a game appeared on the screen.
C．there was something wrong with the mouse
D．I found a strange E-mail.
硫化效应
