用Flash打造生物学画版

在生物学课件制作、编制生物学试卷和写作生物学教案、论文时，需要绘制生物学图解。虽然有专用的绘图软件，但制作起来，也不是这么简单和快捷。为了绘制生物图解，可以将生物图要素做好保存起来，如细胞图，可分解为细胞膜、细胞器（线粒体、叶绿体、内质网、中心体、高尔基体等）和细胞核（染色体、染色质等），用时调出来按要求组合成需要的生物图。

作文“五步走”

本文从五个方面谈了作文"五步走"教学法,环环相扣,层层深入。这五种方法在作文教学实践中,效果非常好,学生对作文的恐惧感消失了,并写出了有新意的好文章。

Coca Cola的由来

1886年，美国乔治亚洲亚特兰大市的一个药房老板约翰·潘巴顿自制了一种能够提神的药水，非常受顾客喜爱。一天，有一个人来买这种药水，潘巴顿在匆忙之中误将一种褐色溶液调了进去，无意之中改变了配方。

Light and Sound

Light travels at a speed which is about a million times faster than the speed of sound.In one second,light travels about 300,000 km,but sound travels only 314m,you can get some idea of this difference(区别) by watching the start of a race.

Light and Sound

Light travels at a speed which is about a million times faster than the speed of sound. In one second, light travels about 300,000 km, but sound travels only 314m, you can get some idea of this difference(区别) by watching the start of a race.

Light and Sound

Light travels at a speed which is about amillion times faster than the speed of sound.In onesecond,light travels about 300,000 km,but soundtravels only 314m,you can get some idea of thisdifference(区别)by watching the start of a race. If you stand some distance(距离) away fromthe starter(发令员),you can see smoke from hisgun before the sound reaches your ears.This