People at about age 22 or 23 can't keep learning because their brain is done developing.
查看答案
"The Big Three" criteria for becoming an adult have been ranked highly in China.
A. 对
B. 错
Although society can define a life stage, a lot of the defining of adulthood still depends on the individual.
A. 对
B. 错
浏览器缓存就是把一个已经请求过的Web 资源（如html页面，图片，js，数据等）拷 贝一份副本储存在内存中。
A. 对
B. 错
鸟类的原条由何类细胞构成？（ ）
A. 预定中胚层细胞
B. 预定内胚层细胞
C. 以上两类
D. 以上两类外的细胞
微信支付 
支付宝支付