问题
补全对话，情景问答
补全对话。
A: There a nature park in the city.
B: there a river in the park?
A: Yes, there .
B: there a farm?
A: No, there .
答案
is, Is, is, Is, isn't
搜题请搜索小程序“爱下问搜题”
补全对话。
A: There a nature park in the city.
B: there a river in the park?
A: Yes, there .
B: there a farm?
A: No, there .
is, Is, is, Is, isn't
37°的固定斜面上，对物体施以平行于斜面向上的拉力F，当作用时间为t1=1s时撤去拉力，物体运动的部分
图象如图乙所示，g=10m/s2，求：