题目

When Mr. Holland was a young man, he played a lot of football, and he was always thin and strong. But then he worked in an office for many years, and he drove to work in a car, so when he was 40, he was very fat.One day, one of his colleagues(同事) said to him, “Would you like to be thinner. Fred?”“Of course I would,” answered Mr. Holland. “Well,” said his colleague, “stop going to the office by car, and get a bicycle.”“It’s very hard to learn to ride a bicycle at your age,” said his wife(妻子).However, it was not too hard for Mr. Holland to do. He usually sat in his 某小组对反应2X (g) + Y(g)2Z(g)进行对照实验(见下表)。下列有关说法错误的是( )实验序号反应温度c(X)mol/Lc(Y)mol/L1400℃212400℃22A.该反应为可逆反应B.探究温度对反应速率的影响C.探究浓度对反应速率的影响D.实验2的反应速率较快