题干
－May I have a glass of beer, please?
－Beer? There is _________ left, but you can have some orange juice.
－Beer? There is _________ left, but you can have some orange juice.
|
A：none
B：no one
C：nothing
D：a little
答案(点此获取答案解析）
A
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 （ ）