This is a first time that the child has seen an elephant.
This is a first time that the child has seen an elephant.
Dickens’ s first child hero is Oliver Twist.（)
Dickens’ s first child hero is Oliver Twist.（)
By the time their first child was born, they (live) ______ in Toronto for five years.
By the time their first child was born, they (live) ______ in Toronto for five years.
Why is Ms. Lavender not satisfied with her hospital experience with her first child?
Why is Ms. Lavender not satisfied with her hospital experience with her first child?
jQuery的过滤选择器中，选择最后一个元素的是（）。 A: ：first-child（） B: ：last C: ：first D: ：ntn-child（）
jQuery的过滤选择器中，选择最后一个元素的是（）。 A: ：first-child（） B: ：last C: ：first D: ：ntn-child（）
:first-child和:first过滤器一样,都提取的是第一个元素,因此获取绝不可能是一个jquery对象集合。
:first-child和:first过滤器一样,都提取的是第一个元素,因此获取绝不可能是一个jquery对象集合。
选取每个＜ul＞元素的第一个＜li＞元素（） A: $（"ulli：first"） B: $（"ulli：first-child"） C: $（"ulli：1-child"） D: $（"ulli：0-child"）
选取每个＜ul＞元素的第一个＜li＞元素（） A: $（"ulli：first"） B: $（"ulli：first-child"） C: $（"ulli：1-child"） D: $（"ulli：0-child"）
first -child选择器只能获取父级元素下的一个子元素。
first -child选择器只能获取父级元素下的一个子元素。
Parents should ______ on their child' s first day at school. A: foresee all the problems the child would encounter and arrange all the things for him/her B: supervise their child all day C: pace up and down the room to ease their nervousness D: show their faith that their child can cope with the new situation
Parents should ______ on their child' s first day at school. A: foresee all the problems the child would encounter and arrange all the things for him/her B: supervise their child all day C: pace up and down the room to ease their nervousness D: show their faith that their child can cope with the new situation
Eye doctors recommend that a child's first eye exam ____ at the age of six months old. A: was B: be C: were D: is
Eye doctors recommend that a child's first eye exam ____ at the age of six months old. A: was B: be C: were D: is