国外营销学界研究表明：如果顾客在银行享受4种或者4种以上的服务，那么银行留住顾客的概

补全对话。

(A New English-Chinese Dictionary is on sale in the Foreign Languagesr Bookstore. Dick is too busy to go there, He asks John to get one for him.)

- Hello! May I speak to John,please?

-This is John speaking.1.                      

-It's Dick. 1'm at home. 

-2.                                 

-1'm looking alter my mother.

-3.                                   

-She is ill. She has caught a bad cold.

-4.                                    Can I help you?

-Yes,thank you. I hear a New English-Chinese Dictionary is on sale at the Foreign

Languages Bookstore. Will you please go there and get one for me?

-5.                       I'11 go right now

-Thank you very much.  

-You're welcome.

配制100ml的0．2mol／L盐酸（36．46m01／L），已知市售盐酸的浓度为37％，比重1．19，所需盐酸的体积为（）

A.1.66L

B.1.66ml

C.1.98ml

D.1.98L

E.1.66×10ml

栓塞程度

（）是保持经济维持中高速增长的必要手段，是主动适应和引领经济发展“新常态”，保证中国经济发展“行稳致远”的关键战略举措。

A.产业升级

B.产业转型

C.产业结构调整

D.产业创新

什么是临界胶束浓度及其测定方法？