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【单选题】
Injectors on modern engines are cooled by a combination of the intensive bore cooling in the cylinder by a combination of the intensive bore pockets and by the fuel which is re-circulated through the injector when the follower is on the ______ of the cam or when the engine is stopped.
A.
slope
B.
base
C.
top
D.
bottom
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senders.
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查看完整题目与答案
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B.
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C.
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D.
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