企业为客户提供产品或劳务后取得的利润水平，被称为（）。
A.客户保留度
B.客户满意度
C.客户获取率
D.客户利润贡献率
参考答案：D
双胍类主要用于下列哪种糖尿病患者（）。
A.肥胖的2型糖尿病患者
B.并发DKA糖尿病人
C.所有儿童糖尿病人
D.老年糖尿病人
E.妊娠糖尿病
根据句意和首字母提示，补全下列单词。
1. I have a toothache and I have to go to the d_________.
2. — I'm sorry, I can't go to the movies with you.
— That's too bad. Maybe a_________ time.
3. Liu Li and Liu Ying are twins. They have some things in c_________.
4. Sauce is a kind of r_________.
5. He b_________ a doctor when he was 23.
