下列变化不能反映出化学变化的本质特征的是（ ） A．电灯泡通电发光了 B．盐酸洗

Having conversations with friends is not a good way to learn English because students usually get excited

about something and _______speaking in Chinese.    [ ]

A. think up    

B. end up    

D. set up    

D. put up

.

四、书面表达（共20分）

根据题目所提出的具体要求，写出一篇连贯完整的短文。词数不少于60。

Describing a birthday party of your grandmother．Use the information given in the table as well as your own imagination．There should be four paragraphs，including the following four parts:

1)Introduction to the situation

2) How it began

3)During the party

4) How it ended

Time                              December 8th,2009

Place                              Uncle’s house

Who                               Family and friends

Preparation                     Food,drinks,birthday cake…

__________________________________________________________________________________________________________________________________________________________

在计算机中，条码阅读器属于______。

A．输入设备

B．存储设备

C．输出设备

D．计算设备

弹力产生的条件，说法正确的是（）

A、直接接触的物体间一定会产生弹性

B、不直接接触的物体间一定不会产生弹性

C、只有发生弹性变形的物体间才会产生弹力

D、发生弹性变形的物体间一定会产生弹力

简述滤纸色斑法的具体做法。