问题
选择题
- Shall we fly to Hainan for the winter ?
-_________ It's warmer there .
A Have a good time B That sounds great C You are right D It must be expenive
答案
B
略
搜题请搜索小程序“爱下问搜题”
- Shall we fly to Hainan for the winter ?
-_________ It's warmer there .
A Have a good time B That sounds great C You are right D It must be expenive
B
略
kg和m2 = 2.0kg的两物块，同时分别从左右劈面的顶端从静止开始下滑，劈块始终与水平面保持相对静止，各相互接触面之间的动摩擦因数均为μ =" 0.20" ，求两物块下滑过程中(m1和m2均未达到底端)劈块受到地面的摩擦力。（g = 10m/s2）