匹配父元素的倒数第n个子元素E的选择符是()
A. E:last-child
B. E:only-child
C. E:nth-child(n)
D. E:nth-last-child(n)
匹配父元素的倒数第n个子元素E的选择符是()
A. E:last-of-type
B. E:only-of-type
C. E:nth-of-type(n)
D. E:nth-last-of-type(n)
匹配没有任何子元素(包括text节点)的元素E的选择符是()
A. E:empty
B. E:checked
C. E:enabled
D. E:disabled
匹配用户界面上处于选中状态的元素E的选择符是()
A. E:empty
B. E:checked
C. E:enabled
D. E:disabled