将铁片放入下列溶液中充分反应后，溶液的质量比反应前增加的是（ ）
A．硫酸铜溶液
B．硫酸溶液
C．硫酸亚铁溶液
D．稀盐酸
A、把铁片放入CuSO4溶液中，生成FeSO4溶液，且每反应一个铁原子则置换出一个铜原子，也就是质量56份的铁原子会置换出64份质量的铜原子，故溶液质量减少，故A错；
B、铁与硫酸溶液反应后，生成硫酸亚铁溶液，且每反应一个铁原子则置换出一个氢分子，也就是质量56份的铁原子会置换出2份质量的氢分子，故溶液质量增加．故B正确；
C、铁与硫酸亚铁溶液不反应，溶液质量不变，故C错；
D、铁与稀盐酸反应后，生成氯化亚铁溶液，且每反应一个铁原子则置换出一个氢分子，也就是质量56份的铁原子会置换出2份质量的氢分子，故溶液质量增加．故D正确；
故选BD．
| 阅读理解。 |
| James is an American boy. He's going to be a student in a middle school in Shanghai. He wants to know much about China, because his parents tell him there are many festivals in China. So now he's trying to find something about Mid-Autumn Festival (中秋节). Here's what his computer tells him. Mid-Autumn Festival usually comes in September or October. On that day many families will have a big dinner. They will send moon cakes to their friends as presents (礼物). Then in the evening people will go out to celebrate (庆祝) the round moon. It seems bigger and brighter. They also tell the story of Chang'e flies to the moon. It's the time for all the family members to get together. James thinks of Thanksgiving Day in his country. It's almost the same as Mid-Autumn Festival in China. So he thinks he's going to talk about that to his Chinese friends. Here's what he's going to say: The American people celebrate Thanksgiving Day on the forth Thursday of November. On that day people give thanks to God for giving them a good harvest (丰收). It's usually a family day. People get together to celebrate the harvest. A big turkey (火鸡) and some pumpkin pies (南瓜派) are their special food for the festival. They always have a lot of eat. |
| 1. Who tells James something about Mid-Autumn Festival in China? |
[ ] |
| A. His parents. B. His computer. C. His friend. |
| 2. When does Thanksgiving Day in America come? |
[ ] |
| A. In September or October. B. In November. C. In July. |
| 3. On Thanksgiving Day. American people do everything except (除…之外) that ______. |
[ ] |
| A. the family members get together B. people celebrate the harvest C. people eat moon cakes to celebrate the festival |
| 4. What is the meaning of the word "Thanksgiving"? |
[ ] |
| A. People give thanks to their parents. B. People give thanks to their country. C. People give thanks to God for giving them a good harvest. |
| 5. Which of the following is right? |
[ ] |
| A. People will give moon cakes to their friends as presents on Mid-Autumn Festival. B. Thanksgiving Day is on Tuesday. C. People often eat turkeys and pumpkin pies on Mid-Autumn Festival. |