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【单选题】
增压四冲程柴油机的进气阀开启提前角q1＝40°，进气阀关闭滞后角q2＝32°，进气阀凸轮作用角应等于（）。A.
Dqc＝252°
B.
Dqc＝108°
C.
Dqc＝126°
D.
Dqc＝54°
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反馈参考答案：
举一反三
【简答题】职位分析的步骤有哪些?每一步需要完成什么任务?
【单选题】Financial markets have the basic function of______.
A.
bringing together people with funds to lend and people who want to borrow funds
B.
assuring that the swings in the business cycle are less pronounced
C.
assuring that governments need never resort to printing money
D.
both A and B
E.
both B and C
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