问题
单项选择题
闭环控制系统控制的理论空燃比为（）。
A、14.7
B、15
C、20
D、15.7
答案
参考答案：A
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闭环控制系统控制的理论空燃比为（）。
A、14.7
B、15
C、20
D、15.7
参考答案：A
| 看图完成对话，每空一词。 |
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