问题
选择题
After a whole afternoon's heated discussion, they finally ________ to us what had been decided. [ ]
A. told
B. declared
C. stated
D. made
答案
答案：B
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After a whole afternoon's heated discussion, they finally ________ to us what had been decided. [ ]
A. told
B. declared
C. stated
D. made
答案：B
的斜面体 B静置在水平地面上，物体A放在斜面上且与B保持相对静止。现对斜面体B施加向左的水平推力，使物体A和斜面体B一起向左做加速运动，加速度从零开始逐渐增大，直到A和B开始发生相对运动，则关于A物体受到B物体的支持力
和摩擦力
，下列说法正确的是：