题目内容

The , the heart of the electrical system in your car, begins with thebattery. The key is inserted into theIgnition Switch and then turned to the start position.

A. stating system
B. cooling system
C. ignition system
D. fuel system

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A包含B,说明B是A的()

A()B,说明B是A的子集

A包含B,说明B是A的子集

A. 对
B. 错

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