题干
I was invited to attend the meeting but I didn’t make it.
A：join
B：take part in
C：see
答案(点此获取答案解析）
B
I was invited to attend the meeting but I didn’t make it.
A：join
B：take part in
C：see
的斜面，让小物块以相同的初速度沿板上滑。若小物块与木板之间的动摩擦因数为
，则小物块上滑到最高位置所需时间与t之比为