用向上排空气法在容积为V mL的集气瓶中收集HCl,收集后瓶内气体的密度是相同条件下He密度的8.5倍.将此集气瓶倒置于水中,瓶内水面上升到一定高度后立即停止上升,则同温同压下,瓶内剩余气体的体积为( )
A:V/4 mL
B:V/3 mL
C:V/5 mL
D:无法判断
一矩形闭合线圈绕垂直于匀强磁场并位于线圈平面内的固定轴转动,下述说法正确的是( )
我们要培养的良好行为方式( )
My pen pal Andrew found it difficult Chinese well.
look good on, pay attention to, affect ones moods, important, fair
have problems with show off, remind me of, make a decision take action
生活中﹣些物质物质的pH值如图所示,以下说法错误的是( )