人口研究学院位于德国北部城市罗斯托克，该学院的科学家们通过分析奥地利、丹麦和澳大利亚3国超过100万的人口普查数据得出结论，人们50岁以后的平均寿命与出生月份之间存在关联。

47. 春天分娩的母亲孕期的最后阶段适逢冬季，因此她摄入的维生素要比夏季时少。

48. 她停止哺乳开始让婴儿正常进食的时候又正好赶上夏天最热的那几个星期，这时候婴儿容易发生消化系统感染。

49. 生于澳洲秋天——欧洲的春天——的成人寿命比春天出生的长大约4个月。

50. 研究者们使用死亡证明和人口普查数据作为参考资料，主要对象是20世纪初出生的人。多布哈默说，尽管人们在一年中各个时期的营养状况与那时相比都已经有所改善，这样的季节性差异却依然存在。

 

Section Ⅲ Writing

51

May 20th

Dear Lily,

I am sorry I missed seeing you yesterday. I know that you must have been disappointed. I also feel worried and anxious in my heart. The fact is that my manager at the last moment asked me to prepare a urgent plan while I could not get to a phone to call you and yesterday I have worked late until about 8:30 p.m. I am terribly sorry.

However, I would like to ask you out this weekend to make up for yesterday. Please give me a chance and I am waiting for your reply.

Sincerely yours,Li Ming

52

From the picture, we can see that sellers and manufacturers try their best to make consumers believe that their products are qualified. Promotion now becomes more and more important in marketing for all marketers. But quality of products plays increasingly vital role in it.

Quality one the one hand determines the sum of sales and on the other hand guarantees the confidence of the consumers. Now, in China the government set 3.15 as the ceremonial day for reminding people of quality which reveals the past that quality of product were not satisfied by consumers. Good quality can gradually make consumers confident with the product and at the same time buyers can purchase the same brand of product to a large degree.

All in all, products can always play the decisive role in sales of all kinds of products. Fortunately, not only the government but also the sellers now in China have realized that the quality of products should be stressed and corresponding measures have been taken to ensure its effectiveness. As I am sure, in the near future, quality products and quality service will become a life.