题目

情景交际M: Life moves so fast now. When I was a young man, (它更放松一些).W: I know! People today are always driving around, (在电话上交谈), and sitting at their computers.M: When I was young, people sat down and played cards or went fishing when they had extra time. (他们喜欢生活中的简单事情).W: Exactly! Now they play games on their computers with a person they can't even see!M: It's no wonder that people are so stressed out.W: I know. These young people need to slow down and enjoy life.M: (他们应该回到过去), when children just played outside instead of体积为1 L的干燥容器中充入氨气，测得容器中气体对氢气的相对密度为9.7．用此气体进行喷泉实验，当喷泉停止后，进入容器中液体的体积约是A.0.2 LB.0.25 LC.0.75 LD.0.8 L