学生上课都在玩“pad”
老师竟然不管？？！！
这样玩？
这样玩？
这样玩？
怎
么
回
事
？
原来这是省实验国际部中加班学生在完成作业——每天100个单词！意不意外！惊不惊喜！
除此之外，省实验国际部中加班老师是如何布置作业呢？
如
下
图
所
示
省实验国际部赏金墙
快来赚赏金！！！
省实验国际部在本学期推出了赏金任务墙。每位老师每周出一道本学科相对较难的题目贴在专门的赏金墙上，并附上相应的赏金分值，谁最先答出题谁就得分。
灵感来源于电影《心灵捕手》
部分赏金题曝光：
化学：
Chemistry of fireworks
When you see a colorful display of fireworks, you probably don’t think about chemistry. However, creators of fireworks displays have to keep chemistry in mind. Packing what will provide “the rocket’s red glare” for the 4th of July display is done by hand. Employees learn to follow proper precautions to avoid fires and explosions.
Typical fireworks contain an oxidizer, a fuel, a binder, and a color producer. The oxidizer is the main component, making up 38–64 percent of the material. A common oxidizer is potassium perchlorate . The presence of chlorine in the oxidizer adds brightness to the colors by producing light-emitting chloride salts that make each color flame sparkle. When it oxidizes a fuel such as aluminum or sulfur, it produces an exothermic reaction with noise and flashes. Aluminum or magnesium makes the flash dazzling blue-white. The loud noise comes from the rapidly expanding gases. Other fuels not only raise the temperature but also bind the loosely assembled materials together.
Question：
1.There are _________ parts of a typical firework which contains __________________________________________________________.
2.Write the chemical formula of a common oxidizer in a firework: ____________________________________
3.Which element can make the colors brighter? ___________________
4.What is the exothermic reaction? What is the opposite of an exothermic reaction?
生物：
Draw the pictures of an animal cell and a plant cell，then label the structures of each cell and write down the functions of each structure .