（）适用于需要较大功率储备或瞬时发出最大功率的轿车、中小型货车等
A.1小时功率
B.12小时功率
C.持续功率
D.15分钟功率
参考答案：D
This is a very interesting book. I’ll buy it, _____.
A．how much may it cost
B．no matter how it may cost
C．however much it may cost
D．whatever may it cost
对气道阻力影响不大的因素是（）。
A.气体流速
B.气道口径大小
C.气道物理形状
D.气道内分泌物聚积
E.身高
