假如某一陶瓷企业每年需消耗泥料800吨，每吨泥料的价格为20000元，每吨泥料的保管费率为1%，单次订货成本为800元，订货提前期为10天，该企业每年的工作日为300天。
根据以上材料，回答下列问题：
企业每年的订货次数为（）次。
A．5
B．10
C．15
D．20
参考答案：B
解析：
订货次数
=10(次)，企业每年的订货次数为10次。
从所给句子中选择恰当的句子完成下列对话。（有两句多余） A: Hello, Nick! 小题1:__________________ B: Hello, Tony. I’m going to school. A: Is the school near your home or far from? B: It’s near. A: Then how do you go to school, by bike or by bus? B: 小题2: ____________ Sometimes I’m late, and then I go to school by bus. A: What time do the classes begin? B: At eight o’clock. A: Are the classes over in the middle of the day? B: No, they aren’t. 小题3:_______________ A: Do you often play basketball or football after school? B: I don’t like playing them. I like swimming. A: 小题4: ________________ B: I do my homework. After that I watch TV until half past nine. 小题5:___________ A: I nearly do the same things every evening.
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