[单选题] What is the function of a backing plate?

1、[单选题]__ is a computer-controlled brake system that helps prevent wheel lockup during braking.

• A、ABS
• B、ITS
• C、GPS
• D、EBCM

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2、[单选题]When you turn the key to a car, the starter motor will __.

• A、send electricity to the spark plugs, then start the ignition system.
• B、send electricity to the fuel pump, then force the car to start.
• C、spin the engine a few revolutions, then start the combustion process.

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3、[单选题]Spark timing is so critical to an engine’s performance that most modern cars use a sensor to tell the engine control unit(ECU) __ .
l.

• A、the exact temperature of the spark plugs.
• B、the exact position of the pistons.
• C、 the exact location of the coi

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4、[主观题]【翻译】 It is apparent from this description that the exhaust valve stays open for a short period of time during which the intake valve is also open. In other words, the end of the exhaust stroke and the beginning of the intake stoke overlap for a short period of time. This is called valve overlap. Valve timing and valve overlap vary on different engines.

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5、[主观题]【翻译】As each cylinder fires, it causes the crank throw to speed up. The inertia of the rest of shaft cause it to stay slightly behind, resulting in a twisting action on the crankshaft.

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