WHO龋病流行程度评价的指标是（） A.龋齿发病率 B.患龋率 C.龋均 D.龋面均

单因素方差分析中，能成立的公式为

A．SS_总＝SS_组内+SS_误差
B．SS_总＝SS_组内+SS_组间
C．MS_总＝MS_组内+MS_误差
D．MS_总＝MS_组内+MS_组间
E．SS_总＝SS_处理+SS_配伍

通过互动式的沟通，使房地产经纪人与委托人对某些问题能够进行深入的探讨，获得更多的信息，这是倾听技巧方法中的（）。

A.投入式倾听

B.鼓励式倾听

C.分析式倾听

D.记录式倾听

第三部分：阅读理解（共20小题；每小题2分，满分40分）

阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项。

Does your cordless phone crackle (噼噼响) , fade, or go dead when you move only a few feet from the base? If so, we recommend that you try a Techtalk cordless phone.

Techtalk cordless phones arc the only ones with the patented Cellular 6 technology. The result is a phone with excellent clarity, range, and security.

Clarity: It's essential that you communicate efficiently and effectively. No static (静电), echo, or crackling will ever interfere (干扰) with your conversations on a Tcchtalk phone.

Range: Techtalk provides up to four times the range of an ordinary cordless phone. It will go anywhere you need it throughout your home in your yard, even around the Block.

Security: Some cordless phones allow other cordless  phone users to overhear (偷听) your conversations. Not Techtalk. We guarantee (保证) complete privacy whenever you talk to your friends, family , or business associates.

You decide an ordinary cordless phone or Techtalk? Visit your favorite electronics store this month and take a Techtalk home for a 30-day trial. If you don't agree that it's superior to all other cordless phones, return it for a full refund.

56. This passage is _________.

A. a newspaper article  B. an advertisement  C. a letter          D. a scientific introduction

57. What is Techtalk?

A. A kind of cordless phones.         

B. A company that used cordless phones.

C. A new technology that reduces static.

D. A mobile phone with the patented Cellular 6 technology.

58. This month, you can ________.

A. get a reduced price on a Techtalk   

B. try a Techtalk at home

C. get any cordless phone which you like 

D. exchange a Techtalk phone for an ordinary phone.

天象

在实际运行中，经消弧线圈接地的系统一般采用欠补偿方式。