freight car(s) / passenger car(s)A A _______________ seals a brake pipe.B Brake pipes are connected by a _________________.

pipe

Radiation heat transfer of smoke tube boiler mainly occurs in , convection heat transfer mainly occurs in . A: Furnace and smoke pipe B: Smoke pipe and furnace C: Needle tube, smoke box D: Smoke box and smoke pipe

A hot air start pipe indicates that there is （）.

The image of Einstein with his hair style and pipe was ______.

词义搭配： coolant pipe --- 回油管

Which statement is right： A: Both message queue and unnamed pipe can send/receive messages between any two processes. B: Both message queue and unnamed pipe can send /receive messages with the specified type. C: Both message queue and named pipe can send/receive messages between any two processes. D: Both message queue and named pipe can send /receive messages with the specified type.

The lower header is between the drum and the lowering pipe (). A: Right B: Wrong

PIPE模型中的P代表什么？

（） at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.