①灰尘由于具有惯性,继续保持原来的静止状态;
②一手拿着沾有灰尘的衣服,用另一只手轻轻拍打;
③灰尘与衣服分离落向地面,衣服便干净了;
④衣服受力后运动状态发生改变,由静止运动起来.
A:②④①③
B:②③①④
C:②③④①
D:②④③①
--- Look! So many colorful bicycles in two lines over there.
--- They're for public. This ______ of green smart traffic is everywhere in Xiangyang city.
The baby animal likes to sleep in the daytime and plays in the evening.
给下面字词选择正确的读音。
风调雨顺