明代航海家--郑和，曾七次下西洋，其航海船队由五种船只组成，其长度和宽度的大小见

Light travels at a speed which is about a million times faster than the speed of sound. You can get some idea of this difference by watching the start of a race. If you stand some distance(距离) away from the starter, you can see smoke from his gun before the sound reaches your ears.

This great speed of light produces some strange facts. Sunlight(太阳光) takes about 8 minutes to reach us. If you look at the light of the moon tonight, remember that the light rays left the moon 1.3 seconds before they reached you. The nearest star is so far away that the light that you can see from it tonight started to travel towards you four years ago at a speed of nearly 2 million km. per minute. In some cases, the light from one of tonight’s stars had started on its journey to you before you were born.

Thus, if we want to be honest, we can’t say, “The stars are shining tonight.” We have to say instead, “The stars look pretty. They were shining four years ago, but their light has only just reached the earth.”

小题1:Light speed is ______ sound speed.

A．as fast as

B．a million times slower than

C．about millions of times faster than

D．about a million times faster than小题2: If you stand 200 meters away from a man who is firing a gun to start a race, you will find out that ______.

A．you can hear the sound before you see the smoke

B．the sound does not travel as fast as light

C．the sound will reach you before the man fires

D．sound travels about a million times faster than light小题3:Sunlight obviously(显然的) ______ than the light of the moon.

A．has to travel a greater distance

B．moves less quickly

C．travels much more quickly

D．is less powerful小题4: The scientific way of saying "The stars are shining tonight" should be ______.

A．the stars have been shining all the time

B．the stars seen tonight will shine four years later

C．the stars were shining long ago but seen tonight

D．the starlight seen today could be seen four years ago

历史上的文化交流，今天的经济全球化，使文化的扩散一直沿续。回答8—9题。

小题1:目前，我国已加入WTO，我国的企业为争取国际竞争力，学习外国的技术及管理措施等，这种管理经验等的传播属于（   ）

A．等级扩散

B．刺激扩散

C．传染扩散

D．迁移扩散小题2:下列叙述正确的是（   ）

①唐僧取经，传播佛教是等级扩散

②外语培训班教授外语是传染扩散，属于扩展扩散的一种形式

③文化现象由许多文化系统构成

④文成公主入藏教会藏族人农耕技术，加强了汉藏间文化联系，这种现象属于迁移扩散

A．①②

B．①③

C．②③

D．②④

简要病史：女性，21岁，发热伴咽痛、咳嗽2天。

我国农村发展学前教育的一种重要形式是（）。

A.托儿所

B.亲子班

C.学前班

D.幼儿园

如图所示，小球静止在小车中的光滑斜面A和光滑竖直挡板B之间，原小车向左匀速运动，现在小车改为向左减速运动，那么关于斜面A对小球的弹力F_NA的大小和挡板B对小球的弹力F_NB的大小，以下说法正确的是（）

A.F_NA不变，F_NB减小

B.F_NA增大，F_NB不变

C.F_NB有可能增大

D.F_NA可能为零