“珍珠如土金如铁”“白玉为床金做马”分别是说()
A.薛家,史家
B.贾家,史家
C.史家,贾家
D.薛家,贾家
参考答案:D
连词成句。
1. clothes are Many the in closet
2. can What see you the over bed
3. this bedroom Is your
4. are two There end tables my in room
5. tell Can me you more?
如图所示,质量为lkg的物体静止在倾角为30°的斜面上.①画出物体受力的示意图;②物体受到静摩擦力的大小为______;③物体受到弹力的大小为______;④物体受到的合力大小为______.