为了使同学们更加健康快乐地成长，学校决定向同学们征求建议。假如你是王宏，用英语给校长写一篇80个词左右的建议信。注意：文中应包含所有要点，并适当发挥；不能出现真实的校名和姓名。开头和结尾已给出，不计入总词数。

Dear Headmaster,
These days we are talking about how to have a better school life. Here are some of my suggestions. First, I hope our school will . Hope my suggestions will be helpful.
Yours sincerely,
Wang Hong

稀释质量分数为98％（密度为1.84g/ mL）的浓硫酸，配制500 mL质量分数为20％的稀硫酸（密度为1.14g/ mL），稀释时需用的水的体积约为（  ）

二次函数y=$\frac{2}{3}$x²的图象如图所示，点A₀位于坐标原点，点A₁，A₂，A₃，…，A_n在y轴的正半轴上，点B₁，B₂，B₃，…，B_n在二次函数位于第一象限的图象上，点C₁，C₂，C₃，…，C_n在二次函数位于第二象限的图象上，四边形A₀B₁A₁C₁，四边形A₁B₂A₂C₂，四边形A₂B₃A₃C₃，…，四边形A_n﹣1B_nA_nC_n都是菱形，∠A₀B₁A₁=∠A₁B₂A₂=∠A₂B₃A₃=…=∠A_n﹣1B_nA_n=60°，则A₁点的坐标为____ ，菱形A_n﹣1B_nA_nC_n的周长为　____ ．

   Mr. King works very long hours every day. He usually gets up at 5:30. He brushes his teeth quickly and goes to his workplace (工作地点). Then he runs with some kids. After that he takes a shower. He eats his breakfast at 7:00. His work starts at 8:10. He is good at math and many boys and girls learn math from him. All the kids like him very much. He often talks or plays games with the kids. He usually goes to bed after 22:00. He is often very tired but he likes his job and loves the kids. He doesn’t work on weekends. Mr. King likes reading at home on weekends. Sometimes some kids’ parents come to his home to talk about their kids. When Monday comes, Mr. King gets busy again