discover science

Back to the start

作者： Thomas Hale 21st Century Teens staff

MATHEMATICS is at the heart of science. In the real world, nothing is certain. You can’t be sure the sun will rise tomorrow, for example. But in mathematics, some things are always true. Two is always bigger than one.

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期初二尊享卡用户，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。