若菜点的成本率为50%，则其定价系数为1/2。（）
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出材率是表示原材料利用程度的指标。（）
A. 对
B. 错
某毛料单价12元，出材率为60%，则净料成本应为20元/kg。（）
A. 对
B. 错
固定资产的损耗也是广义成本中的一项。（）
A. 对
B. 错
What's about operas according to the second paragraph
A. The characters in operas don't act but sing.
B. The stories of opera are only about love.
C. The stories of opera may have either happy ending or sad ending.
D. The characters in the opera speak to tell the stories.
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