你能帮帮他们吗
-
A、B两棒均长1m,A悬于高处,B竖于地面,A的下端和B的上端相距20m.今A、B两棒同时运动,A做自由落体运动,20
1年前
-
radio began as ship-to-ship and ship-to-land c___ 填什么
1年前
-
It's difficult for me to learn a lesson in life until we've
1年前
-
如图：在平面直角坐标系中A( - 1, 5 ), B( - 1, 0 ) C( - 4, 3 ).
1年前
-
Would you like to play with us Yes,I would———!A .like B.love
1年前