A:where
B:what
C:whick
D:that
如图(甲)所示,物体甲重30N,被50N的水平压力F甲压在竖直墙壁上保持静止.如图(乙)所示,物体乙重60N,在40N的水平拉力F乙作用下,沿水平桌面匀速向右运动.则物体甲受到的摩擦力f甲和物体乙受到的摩擦力f乙分别是( )
1.2平方米=____平方分米.
1.2立方米=____立方分米.
7120立方厘米=____立方分米.
4.4立方分米=____立方分米____立方厘米.
10立方米80立方分米=____立方米.
--- Show me the map, please. I wonder ______.
--- Look, it's here, in the east of China, near Taiwan Province. ( )
黄土高原与南方地区的重要界线是:( )