题干

据有关媒体报道,受前期多雨、高温等气候影响,今年大闸蟹在全国范围内产量出现了下降。尤其是高品质、大规格的大蟹,其养殖时间长、成本高、数量少,出现了“一蟹难求”的局面。高昂的价格,让消费者望而却步,“不吃螃蟹改吃鱼虾了”;而螃蟹养殖户小王由于科学养殖、合理安排螃蟹上市时间,赚得盆满钵满,他说:“明年我还要扩大规模”;一家螃蟹深加工企业老板说:“我们得多考虑成本,今年日子难过呀”!

结合材料,运用价格的相关知识,分析螃蟹价格的变化对人们的生活与生产会产生哪些影响?

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答案(点此获取答案解析)

生活:价格变动会引起需求量的变动。螃蟹价格上涨,会使人们减少对螃蟹的消费,而导致其替代品如鱼虾等的需求量增加。

生产:①调节产量。螃蟹价格上涨,利润增加,会吸引养殖户扩大养殖规模,科学养殖,增加螃蟹供应量。

②调节生产要素的投入。螃蟹价格的上涨会促使以螃蟹做原材料的食品加工企业减少螃蟹的使用,降低生产成本。

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Jack had an unusual experience last night. He is sharing it with his friends. Ken and May.

Ken: What were you doing, Jack What did you see

Jack: It was half past nine last night and I was getting ready for bed. I heard some strange noise outside while I was brushing my teeth. I wondered what was happening and I went to the window and looked out. To my surprise, I saw a bright yellow green light in the sky.

May: Maybe the light you saw was a UFO! Or a ghost! A few years ago, an American man saw a flying saucer while he was driving along a road. He also saw some strange yellow light. You have heard about it, haven't you

Ken: Don't be imaginative, May. Jack didn't see anything, or anybody. It wasn't a ghost. It was probably a plane, or a shooting star .Perhaps Jack just made a horrible dream!

Jack: I am very serious .I did see something. The light disappeared and then suddenly some “tiny people” were standing in the garden .There were four of them .Two of them ate some flowers in the garden .It was always stretching out its arms.

Ken: Oh, come on, Jack. I really doubt what you have said.

Jack: I am not joking! One of the people was looking at me through the window.

May: Really What did it look like Were you frightened

Jack: Its whole body was green. It had no ears and nose. Its hands were huge. Its eyes were very big and resembled eggs. It started at me and I could hardly move.

Ken: What happened then ?

Jack: I was able to move eventually. I ran and got my camera immediately.

May: And......

Jack: I didn't have a film.

May: Oh no!