In April, 2009, President Hu inspected the warships in Qingdao, ______ the 60th anniversary of the founding of the PLA Navy.
A:marking
B:marked
C:having marked
D:being marked
一杯水放在列车内的水平桌面上,如果水面突然发生了如图6所示的变化,则列车的运动状态可能发生的变化是 ( )