某建设项目年产量为6000件，每件产品的售价为4000元，单位产品可变费用为2400元，预计年固定成本为320万元，则该项目的盈亏平衡点产量是( )件。
A．3000
B．6500
C．2000
D．5200
参考答案：C
解析：根据Q=年固定总成本/(单位产品销售价格-单位产品可变成本)，则Q=320/ (0.4-0.24)=2000(件)。
There are many similarities between the teacher’s work and the actor’s. However, the fact that a good teacher has some of the gifts of a good actor __1__ mean that he will indeed be able to act well on the stage; for there are very important differences __2__ the teacher’s work and the actor’s work. The actor has to speak words which he has learned __3__; he has to repeat exactly the same work each time he plays a certain part; __4__his movements and the way he uses his voice are usually fixed __5__. What he has to do is to make all these carefully learned words and actions seem natural on the stage. The good teacher works in __6__ different way. His audience takes an active part in his play, they ask and answer question, they __7__ orders, and if they don’t understand something, they say so. The teacher therefore has to suit his act __8__ the need of his audience which is his class. I have known many teachers who were fine actors in __9__ but were unable to play a part in a stage-play because their brains would not keep discipline; they could not keep strictly to __10__.
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