9．如图所示，S₁、S₂为两个振动情况完全一样的波源，两列波的

波长都为λ，它们在介质中产生干涉现象，S₁、S₂在空间共形

成6个振动减弱的区域(图中曲线处)，P是振动减弱区域中的

一点，从图中可看出　　　　　　　　　　　　 (　　 )

　　　 A．P点到两波源的距离差等于1．5λ

　　　 B．两波源之间的距离一定在2．5个波长到3．5个波长之间

　　　 C．若P点此时刻振动最弱，则过半个周期后，振动变为最强

　　　 D．当一列波的波峰传到P点时，另一列波的波谷也一定传到P点

8．如图所示，一束白光沿AO方向从真空射入平行玻璃砖中，

　　　 OC、OD为其折射的可见光的边界光线。 现以点O为圆

　　　 心，R为半径作圆，圆与入射光线的交点为A，与折射光

　　　 线的交点是C和D，OO′是法线，A、C、D三点与法线

　　　 的距离AG、CF和DE分别是a、b、d，光在真空中的速

　　　 度等于c。 以下说法中正确的是　　　　　　 (　　 )

　　　 A．在玻璃中光OC的速度小于OD的速度

　　　 B．从玻璃砖下表面射出的所有可见光线均平行

　　　 C．此介质对红光的折射率为a/b

　　　 D．紫光在此介质中的光速等于dc/a

7．如图所示，在垂直纸面向里的匀强磁场的边界上，有两个质量和电量均相同的正、负离子(不计重力)，从O点以相同的速度先后射入磁场中，入射方向与边界成θ角，则正、负离子在磁场中的运动不正确的是　　　　　　　　　　 (　　 )

　　　 A．运动轨迹的半径相同

　　　 B．运动时间相同

　　　 C．重新回到边界时速度的大小和方向相同

　　　 D．重新回到边界的位置与O点的距离相等

6．下列有关光现象的说法中正确的是　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 (　　 )

　　　 A．在太阳光照射下，水面上油膜出现彩色花纹是光的色散现象

　　　 B．在光的双缝干涉实验中，若仅将入射光由绿光改为黄光，则条纹间距变宽

　　　 C．光导纤维丝的内芯材料的折射率比外套材料的折射率大

　　　 D．光的偏振现象说明光是一种纵波

5．如图所示，理想变压器的原、副线圈匝数比为1：5，原线圈两端的交变电压为 氖泡在两端电压达到100V时开始发光，下列说法中正确的有

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 (　　 )

　　　 A．开关接通后，氖泡的发光频率为100Hz

　　　 B．开关接通后，电压表的示数为100 V

　　　 C．开关断开后，电压表的示数变大

　　　 D．开关断开后，变压器的输出功率不变

4．一位学生在教室里朗读课文，一位在楼道里走动的人虽不见读书人，却听到了读书声，这是因为　　　　　　　　 　　　　　　　　　　　　　　　　 (　　 )

　　　 A．教室的墙壁能传播声波 　　　　　　　　　 B．教室的墙壁能反射声波

　　　 C．发生了声波的衍射现象　 　　　　　　　　 D．发生了声波的干涉现象

3．如图所示，为波沿着一条固定的绳子向右刚传播到B点时的波形，由图可判断出A点刚开始的振动方向是　　　　　　　 　　　　　　　　　　　　　　　　 (　　 )

　　　 A．向左　　　　　　　　　 B．向右　　　　　　　　　 C．向下 　　　　　　　　 D．向上

2．如图所示，为一在水平方向传播的简谐波，已知此时质点F向下运动，则以下说法正确的是

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 ( 　　)

　　　 A．波向右传播

　　　 B．质点H与F的运动方向相同

　　　 C．质点C比B先回到平衡位置

　　　 D．此时质点C的加速度为0

1．一列波从一种介质进入另一种介质时，下列说法正确的是　　 　　　　　　　　　　　　　 ( 　　)

　　　 A．频率发生变化，波长和波速不发生变化

　　　 B．波长发生变化，频率和波速不发生变化

　　　 C．波速发生变化，频率和波长不发生变化

　　　 D．波长和波速发生变化，频率不发生变化

3．词数不少于60。

Good evening, ladies and gentlemen.

　　　　 My name is Li Hua, I have the honor of being your guide tomorrow,

[参考范文]

Good evening，ladies and gentlemen，

　　 My name is Li Hua．I have the honor of being your guide tomorrow. Now I'd like to give you a brief introduction to our tour．　　

　　 We’ll meet at the school gate at 8：00 am and set off by bus．As the old Chinese saying goes，“He who does not reach the Great Wall is not a true man”．The first place we will visit is that world famous spot．When you are standing on the wall，you will feel amazed at this man-made wonder on earth．After two hours there，we’ll leave for a snack street where varieties of foods will be waiting for you to try．The afternoon tour will begin from the Summer Palace at about 2：00 pm．You can take a boat to enjoy the beautiful scenery in the garden and feel free to look around there until 4：00 pm．In the evening，we will watch a wonderful Beijing opera which will let you experience a real Chinese culture．After the show, we’ll return to the school at about 9：00 pm．

　　 Thanks for your listening and I hope you can enjoy your tour tomorrow．

Passage 22

(北京市西城区2009届高三第一次模拟考试--开放作文)

请根据下面提示，写一篇短文。词数不少于50。

　In your English class．the teacher shows the picture below and asks the class to discuss it．Your classmates have different understandings．

Look at title picture carefully and tell the class how YOU undemtand it·

[参考范文]

As we can see from the picture，two people，father and son，are talking to each other．The

Boy, standing on the ground，is looking up at his father，slightly scared，while his father, seated high on a big Chinese character“fu”，meaning“father” ，is shouting to his son．

　　 Such a situation seems fairly common in our society．When talking to each other, father and son are not in equal positions. Fathers simply tell their sons what to do rather than listen patiently．Therefore，sons will have few chances to share their own ideas or open up to their fathers．They often look up to their fathers with respect，fearing that they might not live up to fathers’expectations．

　　 1 hope our parents will listen to us more instead of just giving us orders．

Passage 23

(北京市宣武区2009届高考第一次质量检测--开放作文)

请根据下面提示，写一篇短文。词数不少于50。

In your English class，you are asked to describe the following picture and explain to your classmates how you understand it．

[参考范文]

As we can see in the picture．two men are standing side by side，smiling．They share one characteristics．strong in one am，while weak in the other．I guess they smile because they find someone who can help them accomplish a task that cannot be completed by either of them alone．

　　 Like the two men in the picture，we all have strengths and weaknesses，and what we can do is limited．However，weaknesses don’t necessarily mean failure，but may indicate the possibility of cooperation．By working with others．and making the best use of each other's talents，we can always achieve a better result．

Passage 24

(湖南省湘潭市2009届高三第一次模拟考试)

根据下列图中提供的三种交际方式，选出你最喜欢的一种，并陈述理由。

letter　　　　 　telephone　　　 　　　　computer

My favorite way of communication

________________________________________________________________________________________________________________________________________________________________ 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 　　　　　　　　　　　　　　　　　　　　　

[参考范文]

As we all know, communication has been playing an important part in people’s life. As can be seen in the pictures, there are three ways of communication, of which I like communication by computer most. My reasons are as follows.

　 Firstly, by computer, people can easily send emails to each other at any time and at any place, while it is too slow a way to communicate by writing letters. Moreover, it is easy to lose letters. Secondly, by computer, people can chat to each other face to face, while it is difficult for us to do so on the phone. Finally, surfing on the Internet can provide people varieties of information, which is very convenient and useful to our study as well as to our life. It is really a good way to broaden our horizons and improve people’s understanding of the world.

In a word, communication on the Internet helps bring people all over the world closer.

Passage 25

(宁夏银川一中2009届高三第一次模拟考试)

假设你是李华，你的英国朋友Tom来信询问你们的学习情况。请你根据下图提供的信息，写一封回信，谈谈自从你校实行新课改以来，尝试新的学习方法，你们学习情况的变化。

注意：词数100左右

Dear Tom,

It was great to hear from you again.　　　　　　　　　　　　　　　　　　　　　　　　　　　　

　______

All the best ,

Yours ,

Li Hua

[参考范文]

Dear Tom ,

It was great to hear from you again . There are many things going on in our school . In fact things have got much better since　 we started a different way of learning .

In the past our teachers stood in front of the class talking all the time while we students listened , busily taking notes . After a tiring day at school , we always had a lot of homework to do . Sometimes we even worked late into the night . Now we are active in class . We often have discussions in pairs or in groups . After class we enjoy all kinds of activities , such as going in for sports , dong experiments or surfing the Internet.

We are extremely happy about the changes in our studies .

All the best ,

Yours ,

Li Hua