82．According to the author, why does a couple probably fight？(No more than 4 words)

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　 *It could get hot fast

　 *It should be used with words in an e-mail;

　 *It might make you 80．_________ when getting junk mails．

Section B (10 marks)

Directions: Read the following passage, Answer the questions according to the information

given in the passage．

Scientists have determined it's not advisable to hurry marriage．But what’s the best age to

wed?

When Avril Lavigne announced she was splitting from her husband, comments from her

friends suggested that she was only 21 when she tied the knot and later she said that she realized she'd been too young to make such a life-altering decision．Could fellow young celebrity divorcées(离婚者) Reese Witherspoon, Kate Hudson, and Britney Spears have also hit the same age-related issue?

The Magic Number

There are practical reasons for the mid-20s dividing line, and most of them boil down to two

biggies: education and money．

It turns out that the more years of higher education a woman has under her belt on her

wedding day, the lower the chances that she'll get divorced ．．．and by 25, you're more likely to have earned a degree or two．Educated women tend to be more confident about who they are and less willing to settle for a man who doesn't meet their standards．

Odds(可能性) are that by 25 you're also supporting yourself, so there's less incentive(刺

激; 鼓励)for you to rush into marriage because you're seeking financial security from him．But the marriage-related benefits of working and having money of your own go beyond feeling secure．Learning to budget your cash carefully when you're single will help you avoid financial problems-one of the main causes of couple fights-for the rest of your life．

Knowing the Real You

At 25, you've had time for some crucial life experiences, including a relationship or two that

may have improved your Mr．Right radar．You've probably dated enough to have a better idea of what you don't want in a man, which makes it easier to know what you can live with and can't live without．

Perhaps the most important aspect of waiting is that you'll know what your goals and values

really are．While you don't want to marry someone just like you, marriage is a lot easier if you two share a similar outlook on life．

Twenty-four and already married to the man of your dreams? Don't worry: Many young

marriages survive．But given the choice, you might consider putting off the big day until your mid-20s or later．

81．What main factors influence the mid-20s dividing line? (No more than 3 words)

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*74___________: Facemail can let your e-mails read by a “person”;

*Feature: Facemail faces are 75．____________and changeable;

*76．____________: Life FX

*Future of Facemail: ①It is sure to have 77．___________;

②It may be used in a computer screen 78．___________ to help mothers;

* I was greeted by 72．___________ on my computer when I opened my e-mail the other day;

* She kept reading to me an e-mail from my brother about a high-speed Internet connection;

* Sometimes she would stop to smile or 73．____________;

17．(本题16分)列车员站在站台上的一个位置迎接列车进站，列车进站停下前运动视为匀减速直线运动，第一节车厢通过用了3s，第二节车厢通过用了4s，设各节车厢长度相同，车厢间隙不计，车厢节数足够多，求火车停下时列车员面对的是哪节车厢。

16．(本题12分)如右图所示，A球和B球用轻绳相连静止在光滑的圆柱面上，半个圆柱体静止在水平面上。已知圆柱体半径比A、B两球的半径大得多，若A球的质量为m，求B球的质量为多少？

15．(本题12分) 两个完全相同的物体A、B，质量均为m = 0.8kg，在同一粗糙水平面上以相同的初速度从同一位置开始运动。图中的两条直线分别表示A物体受到水平拉力F作用和B物体不受拉力作用的v－t图象，求：

(1)物体A所受拉力F的大小；

(2)12s末物体A、B之间的距离S。

14．(本题7分)某同学用如图所示装置做探究弹力和弹簧伸长关系的实验。他先测出不挂砝码时弹簧下端指针所指的标尺刻度，然后在弹簧下端挂上砝码，并逐个增加砝码，测出指针所指的标尺刻度，所得数据列表如下：(重力加速度g=9．8m/s²)

　 (1)根据所测数据，在答题卡的坐标纸上作出弹簧指针所指的标尺刻度x与砝码质量m的关系曲线。

　 (2)根据所测得的数据和关系曲线可以判断，在　　 N范围内弹力大小与弹簧伸长关系满足胡克定律．这种规格弹簧的劲度系数为　　　 N/m．

13．(本题5分)已知打点计时器接的交流电频率是f，用它记录一个匀变速运动小车的位移，打出的一条纸带和已选好的计数点0、1、2、3、4、5如图所示．某同学测量出1与2两点间的距离为S_m，4与5两点间的距离为S_n，由此可算出小车运动的加速度a＝_______．

12．质量为0．3kg的物体在水平面上运动，图中的两条直线分别表示物体受水平拉力和不受水平拉力的v-t图像，则下列说法中正确的是　 (　　 )

A．水平拉力可能等于0.3N

B．水平拉力一定等于0.1N[

C．物体的摩擦力可能等于0.1N

D．物体的摩擦力可能等于0.2N