题干
—____________ is it?
—It's five o'clock.
A：What animals
B：What club
C：What time
D：What people
答案(点此获取答案解析）
C
—____________ is it?
—It's five o'clock.
A：What animals
B：What club
C：What time
D：What people
和
，样本标准差分别为
和
，则（ ）