TFDS设备的中文名称是：货车运行故障动态（）检测系统。
A.图像
B.光学
C.声学
参考答案：A
____ in reading the novel , he knew nothing about what was going on about him.
A． Attracted
B．Drawn
C．Absorbed
D．Concentrated
简述火管锅炉和水管锅炉。
