单位燃料完全燃烧后,将燃烧产物中的水蒸汽冷却到零度的水所释放出来的热量也计算在内的发热量称为()。
A.高位发热量
B.低位发热量
C.煤气发热量
参考答案:A
— "Could we put off the meeting?" she asked.
— "_________." He answered politely. "This is the only day everyone is available." [ ]
A. Not likely
B. Not exactly
C. Not nearly
D. Not really
半绕式l:1绕法的电梯,曳引钢丝绳在曳引轮上的包角一般取().
A.130°
B.135°~150°
C.180°
D.360°