题目

实验探索：色光混合成白色光 实验： ①制作一个彩色轮。用硬纸板剪一个直径约5cm的圆，在圆上画出三个相同大小的扇形，并分别涂上红、黄、蓝三种颜色。 ②快速旋转彩色轮。 （1）观察现象： （2）研讨结论： 答案：【1】彩色轮变成白色【2】不同颜色的光可以混合成白光【1】John plays football as____________(good)as his brother jack.【2】Please tell him _____________(wash) his hands before supper.【3】Linda is ____________(tall) one of the two girls.【4】The radio station Oldies 102.1FM is pretty bad. It’s__________(bad) than All Talk 970AM.【5】Tina is____________(short) than Jill.【6】Let’s go to Danny’s. The food there is_________(cheap) than any other place in town.【7】My dog is________(friendly) than yours.【8】The________(love) girl is planning to go shopping.【9】Linda is the_____(win)of the English speech contest.【10】Lots of_____(perform)from different places around China took part in the talent show.