SUPER SCIENCE
Why are car tires black?
汽车轮胎为什么是黑色的?
Take a look at the cars driving down the street. What color are their tires? They are all black. Do you know why?
- 对本期电子报订户、有效期内的VIP教师会员和本学期小学尊享卡用户,我们开放所有内容:
- 如果您拥有以上权限,请点这里登录;
- 订阅电子报,请点这里;
- 激活VIP教师卡,请点这里;
- 激活21英语尊享卡,请点这里。