—Jerry, ______ eat in the classroom.
—Sorry, I _______.
A:doesn't, don't
B:don't, don't
C:don't, won't
D:not, not
杂技演员表演独轮车走钢丝,车轮的直径为40厘米,要骑过100米长的钢丝,车轮大约转动多少周?
既是我国地形区分界线,又位于两省之间的山脉是( )
函数f(x)=cosx,x∈-π6,2π3)的值域是____