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【单选题】
拆装发动机时工具选择的先后顺序是( )。A.
套筒、 梅花扳手、 开口扳手
B.
梅花扳手、套筒、 开口扳手
C.
梅花扳手、 开口扳手、套筒
D.
开口扳手、梅花扳手、套筒
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【单选题】Assume that A represents demand for cars and B represents supply of cars. If A: P = 10,000 - 2Q and B: P = 6000 + 2Q, the equilibrium price and quantity are:
A.
P = 1000, Q = 8000
B.
P = 800, Q = 100
C.
P = 8000, Q = 1000
D.
P = 100, Q = 800
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