如果需求是缺乏弹性的，价格上升增加还是减少了总收益？为什么？
参考答案：将增加总收益。如果需求缺乏弹性，与价格大幅度上升相伴的是需求量少量减少
企业用自己的资金来承担法律规定范围内的健康风险，当发生医疗费用时，企业用现金或事先储备好的专门资金来支付赔偿的健康保险计划称为( )。
A．商业保险 B．内部自我保险 C．指定服务计划 D．社会保险
单句改错
1. I like playing football, but I don't have a friend to play.
A B C ( )
2. I am enjoying to sing English songs.
A B C D ( )
3. We find the speakers to talk too fast.
4. There's an English club in our school. Would you like to join in it?
5. These are new words in this lesson. Please write down them.
