题干
A/An _________ is someone who draws or paints pictures or creates sculptures as a job or a hobby.
A：artist
B：director
C：actor
答案(点此获取答案解析）
A
A/An _________ is someone who draws or paints pictures or creates sculptures as a job or a hobby.
A：artist
B：director
C：actor
（铪），它的中子数是（ ）