题目•空燃比闭环控制的实质在于保持实际空燃比为( )A. 25: 1B. 14.7 : 1C. 10: 1D. 5: 1•空燃比闭环控制的实质在于保持实际空燃比为( )A. 25: 1B. 14.7 : 1C. 10: 1D. 5: 1题目解答答案B. 14.7 : 1