题干
—Gao Shan, be careful with your bags on the train.
—_______, I can look after them well.
A：I think so
B：Good idea
C：Don't worry
D：Of course
答案(点此获取答案解析）
C
的固定斜面上。滑块与斜面之间的动摩擦因数为
。若滑块与斜面之间的最大静摩擦力合滑动摩擦力大小相等，重力加速度为g，则 （ ）