食管炎与早期食管癌的鉴别，主要方法是（） A.食管钡餐透视黏膜紊乱 B.胸骨后灼痛感

选择方框中适当的选项补全对话。

A: Hello. Nice to meet you.

B：Nice to meet you，too.

A:   1   

B: I went to the Palace Museum and the Great Wall

A: Really?  2     

B: Yes, l did. It was very great.

A: But the weather was not good, was it?

B: Yes.    3  

A: How were the people in Beijing?

B:  4   

A:  5   

B: Yes, it's very beautiful and great.

A. How great!I hope I can there one day.

B. It was hot and humid.

C. Did you go to Tian’an Men Square?

D. They were friendly to foreigners (外国人)and they always helped us.

E. Where did you go on vacation?

GreditMonitor模型对有风险贷款和债券进行估值的理论基础是（）。

A.资产组合理论

B.CAPM模型

C.默顿期权定价理论

D.多因素模型

在全国范围内统一和适用的标准是（）。

A.国际标准

B.国家标准

C.行业标准

D.企业标准

反映企业应收帐款周转速度的指标是（）。

A.固定资产周转率

B.存货周转率

C.股东权益周转率

D.总资产周转率

天馈系统的驻波比测试应少于（）为正常？

A.2

B.1.5

C.1

D.1.8