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【单选题】
电控发动机起动后，最佳点火提前角＝（）点火提前角＋基本点火提前角＋修正点火提前角。A.
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B.
反馈
C.
初始
D.
最终
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【简答题】金属的 越好,则其锻造性能越好。
【简答题】When I saw John in his room, he was busy (prepare) his lessons. 2. I'd like to take this opportunity (thank) all of you for coming to join us tonight. 3. My transistor radio isn’t working. It needs (r...
【简答题】Choose either the infinitive form or the –ing form of the verb in the brackets to complete each of the following sentences. (1)When I saw John in his room, he was busy (prepare) his lessons. (2)I’d li...
【简答题】1)When I saw John in his room, he was busy _________ (prepare) his lessons. 2)I’d like to take this opportunity _________ (thank) all of you for coming to join us tonight. 3)My transistor radio isn’t ...
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