Hello,boys and girls. My name is Li Jing. I am a girl student. I am thirteen years old. I think as students, we should work hard at school on weekdays. But we also need to have a good rest to relax myself. So I always study hard when I am at school, but on my day off I often do something else to relax myself.
I had a very relaxing day off. In the morning, I got up at seven o'clock. Then I went to run with my father. I think we need to exercise every day. After all, it's important to keep healthy. After running, I took a shower and had breakfast. At nine o'clock, I went to the aquarium with my friends. We saw some sharks and seals there. Sharks are very scary but the seals are cute. We also saw a dolphin show. I think dolphins are very clever animals. In the giftshop, we bought many gifts. We had great fun there.
In the afternoon, my parents took me to see my grandparents. They live in the beautiful countryside. They were very happy to see me. I talked with my grandparents for long and he told me many interesting things about him. My grandmother cooked lots of delicious food for us.
In the evening, I watched TV with my cousins. We watched a basketball match. The match was very exciting. We were glad when we saw our favorite team in the match.
What a happy day off I had! I hope all of you can have an interesting day off!
阅读短文，回答下列问题。
CO(g)＋H2(g)在一可变容积的密闭容器中进行，下列条件的改变对其反应速率几乎无影响的是( )