在()情况下,烟囱浮力会增加。
A. 烟囱高、大气温度也高
B. 废气温度高、烟囱也高
C. 废气温度低、大气温度高
What is your latest tropical storm warning()?
A. information
B. news
C. description
D. signal
Diesel engine mufflers accomplish noise reduction by ()
A. reducing exhaust gas velocity
B. increasing the frequency of gas vibration
C. the use of long head pipes
D. the use of zinc electrode
车辆静态调空气压缩机系统试验测定调压器调压值启动压力为()。
A. 635±10Kpa
B. 635+20Kpa
C. 735±10Kpa
D. 735+20Kpa