一度房室传导阻滞心电图特点是A．P-R间期恒定，部分P波后无QRS波群 B．部分P波

尊重他人隐私表现在不蓄意打听和刺探别人的秘密。    （   ）

杀菌性抗结核药为（）

A.异烟肼、利福平、乙胺丁醇

B.异烟肼、链霉素、乙胺丁醇

C.异烟肼、利福平、乙硫异烟胺

D.异烟肼、利福平、链霉素、吡嗪酰胺

E.异烟肼、吡嗪酰胺、氨硫脲

A knife and a fork __________on the table.A knife and fork __________on the table.

A．is; is

B．are; are

C．are; is

D．is; are

阅读理解。

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多

余选项。

     In times of economic downturn, many people start to look for ways to reduce their household budget

and save extra cash. Living a thrifty (节俭的) lifestyle does not have to mean doing nothing.   1   Here are some tips.

     Track your spending for at least two weeks. You won't really know how to live a thriftier lifestyle until

you know where your money is going. Write down every time you spend money and take a look at it at

the end of the month.   2  

     Search the Internet when you have to make purchases. Because of the easy access to information,

you can compare prices from more stores in less time.   3  Combining producers' coupons (优惠劵) with

store discounts can lead to major savings.

     Turn off the lights and other electronics in your home when you are not using  them.   4   Leaving

electronics on can use a tremendous amount of extra energy, costing you money.

  5   When you do have to go out, look for available deals and discounts. If you are a frequent restaurant

diner, consider purchasing a guide book for local restaurants, which will help you save money.

A. Eat at home as often as possible.

B. You probably don't really need 500 Chanels.

C. If you really can't live without it, call the company.

D. Open a window and let in the natural light instead.

E. In this way, you will see obvious ways to reduce the small daily expenses.

F. So check your local stores as well as online providers to find the best price.

G. Instead, making small changes will allow you to save money and still enjoy yourself.

人们在购买决策过程中可能扮演哪些不同角色？