问题
选择题
—Is it an old house on the street?
—_____.
A. Yes, it is.
B. Yes, there is.
C. No, there isn't.
D. No, it is.
答案
答案：A
搜题请搜索小程序“爱下问搜题”
—Is it an old house on the street?
—_____.
A. Yes, it is.
B. Yes, there is.
C. No, there isn't.
D. No, it is.
答案：A
，在中间时刻速度为
，那么物体（）