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【单选题】
6缸四冲程发动机的点火间隔角是多少曲轴角度（）？A.
60
B.
120
C.
180
D.
240
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举一反三
【简答题】能力需求计划的作用与意义?
【简答题】更新,刷新 v./n. ________(an u-word)
【单选题】Which is not the official court for 4 major events.
A.
Carpet court
B.
Hard court
C.
Grass court
D.
Clay court
【单选题】Adobe soil differs from other clay soils in that ______.
A.
other clay soils retain less water
B.
other clay soils have smaller particles
C.
adobe soil has had organic material added to it
D.
adobe soil is found mostly in dry climates
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