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【多选题】
（多选）流体在直层流流动时的阻力损失与如下哪几项有关（）A.
B.
管内径
C.
管子的相对粗糙度
D.
流体的密度和黏度
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皮皮学刷刷变学霸
举一反三
【单选题】On the break even point,
A.
The price is equal to firm’s average variable cost.
B.
The price is equal to firm’s average cost.
C.
The price is equal to firm’s average fixed cost.
D.
The price is equal to firm’s total variable cost.
【简答题】The break-even point is the sales level at which operating income is zero and revenues equals total expenses.
【简答题】There is even an animal whose tail will so that it can run away if someone grabs it. A．break up B．break out C．break off D．break down
【单选题】If cost behaviour stays the same but sales volume increases 20%, what will happen to break-even point in revenue dollars and to margin of safety revenue dollars?
A.
Break-even sales remain the same with margin of safety increasing
B.
Break-even sales increaes but margin of safety remains the same
C.
Break-even decreases with margin of safety decreasing
D.
Break-even sales and margin of safety remain the same
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