杨敏新
幼苗
共回答了23个问题采纳率:95.7% 举报
1st.A constant beating on the surface of a container by moleculars shows the macroscopical pressure.Though the kenitic energy and the momentum of a single molecular are tenuity,vast amount of moleculars perform a macroscopical property which can hardly be ignored.
2nd.i don`t quite understant the word 'simpress'.
1年前
7