题干

我们常常看到,寻常的西红柿、豆角、小白菜一装进泡沫塑料盒子再蒙上一层薄薄的保鲜膜,身价顿时翻了几个筋斗。寻常蔬菜“一装”“一蒙”便身价倍增,其根本原因是(    )

A:包装过的蔬菜使用价值增加了

B:包装过的蔬菜营养价值增加了

C:包装过的蔬菜价值量增加了

D:包装过的蔬菜的劳动生产率提高了

上一题 下一题 0.0难度 选择题 更新时间:2017-04-01 05:27:07

答案(点此获取答案解析)

C

同类题1

What do you like most when you can get one of such things: freedom, true friends, love, honesty and so on? Here are some choices of students:
Chen Cheng, 14, Jiangsu: I think I need a true friend. I had some friends before. However, it seemed that they didn’t treat(对待) me well. I told them my secrets but they didn’t share(分享) theirs with me. What’s worse, they told my secrets to others, which made me very unhappy. I hope to find a true lifelong(终身的) friend who can share happiness and sadness with me and keep my secrets.
Gan Xiaoning 14, Heilongjiang: Freedom is what I want most. I am a bird in two cages(笼子). In school, I have to follow the school’s rules and listen to teachers. At home, my parents don’t allow me to do what I like, either. I have to do everything that they tell me to do: study, study and study some more. So, freedom is the only thing I really want!
Yuan Siyu, 15, Guangxi: I am a boy from a poor family. My father works very hard but only makes a little money every month to support(支撑) the family. I want to go to a key university (重点大学)so that I can find a good job in the future. Then, I can earn enough money to get my family out of poverty(贫困) and offer my parents a happy life.
Qu Yi, 15, Hebei: I want a complete family. My parents got divorced(离婚) three years ago. Since then, I have had no chance to be together with both of them any more. Now, I am living with my mom and get her love, but I also want my dad’s love. I am envious(羡慕) of my classmates who live with their parents. So, I would have a complete family if I could.