投资、成本费用、销售收入、利润和（）是构成经济系统现金流量的基本要素。
A.税收
B.税金
C.借贷
D.利息
参考答案：B
阅读短文，完成对话。
It's Monday morning. Betty is not at school. She's staying in bed. She's ill.
Her mother: What's wrong 1. you , Betty?
Betty: I've 2._ a fever, Mum.
Her mother: Oh, you've got a fever and a bad 3._ .Take some medicine and drink a lot of 4. _ .
Betty: OK, Mum.
Her mother: How do you 5. _ now?
Betty: I still feel 6._ .
Her mother: I can 7._ a blanket 8. you.
Betty: Thank you.
肾与膀胱病变可反映的部位是（）
A.舌尖
B.舌中
C.舌下络脉
D.舌边
E.舌根
