Speaker A: Sorry for being late. You see, I was held up by the traffic. Speaker B:______

A．Oh, it's quite all right. Forget it!

B．I also find the traffic very heavy during the rush hours.

C．Yes, the traffic jam is more serious than before.

D．Not at all. You can come anytime.

放在水平桌面上的瓶子，内盛部分饮料，瓶口用塞子塞紧，倒过来时，液体对瓶塞的压强比原来对瓶底的压强_______，原因是_____________________________ ；瓶子对桌面的压强变_________，原因是 ________________________________________。