青霉素钠注射剂皮肤敏感试验的药物浓度应为A．100U/mlB．250U/mlC．50 发布时间：2017-12-26 21:08 │ 来源：www.tikuol.com 题型：单项选择题 问题： 青霉素钠注射剂皮肤敏感试验的药物浓度应为A．100U/mlB．250U/mlC．500U/mlD．750U/mE．1000U/ml
题型：单项选择题 某企业按“2/10，n/50”的条件购进一批商品。若企业放弃现金折扣，在信用期内付款，则其放弃现金折扣的机会成本为( )。A．14% B．20%C．16.18% D．18.37% 查看答案
题型：单项选择题 从A－G选项中选出能填入空白处的最佳选项补全对话。（选项中有两项是多余的）A. Maybe you're right. B. Is there anything wrong? C. I'll try to understand her. D. She nags me about almost everything.E. That's a good idea. F. But she doesn't like it at all. G. Could I use your telephone, please? A: Hello, Xiao Hong! B: Hello! A: You look a little upset. 1______. B: Yes. It's just my mom. She always nags (唠叨) me. A: Really? What does your mother nag you about? B: 2______ " Get up now... Everything must be in place... Don't forget your piano lesson..." A: Well, all the mothers like saying these words to their children. B: Also, I'm fond of pop music. 3______ We don't have the same interest in many things. A: 4______ But I should say she nags you because she cares about you. You're lucky to have such a good mother.B: I agree with you. 5______. A: That's right. Understanding is important. If your mom knows that everything is fine, she will never nag. 查看答案