共计 141 个字符，预计需要花费 1 分钟才能阅读完成。
const bird = {size: 'small'}
const mouse = {
name: 'Mickey',
small: true
}A: mouse.bird.size
B: mouse[bird.size]
C: mouse[bird[“size”]]
D: All of them are valid
参考答案：
正文完
共计 141 个字符，预计需要花费 1 分钟才能阅读完成。
const bird = {size: 'small'}
const mouse = {
name: 'Mickey',
small: true
}A: mouse.bird.size
B: mouse[bird.size]
C: mouse[bird[“size”]]
D: All of them are valid
参考答案：