问题
单项选择题
The number of students of this school（）large.
A.are
B.are not
C.isn't
D.aren't
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
The number of students of this school（）large.
A.are
B.are not
C.isn't
D.aren't
参考答案：C
的固定斜面顶端沿水平方向抛出后落在斜面上。物体与斜面接触时速度与水平方向的夹角
满足____________。 