题干
The Smiths are watching the men's table tennis match at moment.
A：Mr. Smith
B：Mr. Smith and his son
C：The Smith family
答案(点此获取答案解析）
C
The Smiths are watching the men's table tennis match at moment.
A：Mr. Smith
B：Mr. Smith and his son
C：The Smith family
粒子散射实验中，某一