A:which I think i
B:which I think it i
C:which I think it
D:I think which i
如图,在边长为4的正方形ABCD中,动点P从A点出发,以每秒1个单位长度的速度沿AB向B点运动,同时动点Q从B点出发,以每秒2个单位长度的速度沿BC→CD方向运动,当P运动到B点时,P、Q两点同时停止运动.设P点运动的时间为t,△APQ的面积为S,则S与t的函数关系的图象是( )
You won’t find paper cutting difficult _____you keep practicing it.
59×75 ____ 59 67÷3 ____ 67 34×2 ____ 34÷12
如图表示生态系统中的食物网,有关叙述不正确的( )
It is universally ____(承认) that great changes have taken place since the new policy.