某有机物的核磁共振氢谱图如下,该物质可能是( )
A:乙酸
B:苯酚
C:丙醇
D:乙酸乙酯
My favourite sport
My favourite sport is basketball, because basketball can make me strong and happy. It can also help me make more friends and learn teamwork.
I enjoy playing basketball with my friends. Kobe Bryant is my favorite player. I wish I can play basketball with Kobe Bryant one day.
Fishing is my favourite sport. I like fishing but I hardly get any fish. I'm not really interested in fishing. I am only interested in sitting in a boat and doing nothing at all. Anyway I think fishing can make me feel very relaxed and comfortable.
I like swimming because I think it's a funny and easy sport. And swimming is more popular than running. Swimming is good for my health. It can help me keep fit. I joined the swimming club last term. I hope to swim very fast and beautifully. I want to keep my body in a good shape.
I enjoy jogging with my friends Tommy and Betty. In the early mornings, we often go jogging in the park. Then we are ready for school. At weekends, we sometimes go jogging in the countryside. The more I go jogging, the healthier I will feel.
函数f(x)=|x2﹣2x+12|﹣32x+1的零点个数为____
北方某市的一名中学生因意外交通事故受伤住院花费了 7000多元医疗费用。保险公司按照保险合同付给学生保险金3800元。事后学生家长给学校写信说:“真没想到,交了5元钱的保险费,竟然会得到3800元的保险赔偿,参加保险就是好!”这则材料说明参加商业保险的好处在于( )
①商业保险的收益是最高的 ②商业保险是针对风险的一种投资方式
③商业保险是一种计划消费的行为④商业保险为人民生活的稳定提供了重要保障