A:体积减半,压强为原来二倍
B:体积减半,压强增大,但小于原来的2倍
C:体积减半,N2O4的百分含量增大1倍
D:体积减半,则NO2浓度减小
I'm the farmer. ____
宋代文学家范仲淹在脍炙人口的不朽名篇《岳阳楼记》中写道:“皓月千里,浮光跃金,静影沉璧”,文中( )
We are tired. Let's stop ______ to ______.