B Customs of Bulgaria: Marriage and Family保加利亚习俗：婚姻与家庭
The average age for women to marry is between 18 and 25.25 tend to (1) when somewhat older. A church wedding often (2) the legal civil ceremony, and a large reception, which often involves (3) music and dancing, is held in the evening. Wedding traditions include (4) money on the bride’s dress to represent future prosperity, the groom (5) the bride at her home, and the couple pulling on opposite (6) of a loaf of bread—whoever gets the largest piece will be (7) boss of the family. Honeymoons are a new tradition.
The principle (8) mutual support is valued in the Bulgarian family. The elderly are (9) cared for by their adult children. Unmarried adults live with their (10) and many newly married couples live with one set of parents (11) they are able to get housing of their own. Most families (12) urban areas live in apartments, which are in short
supply, while (13) in rural areas usually have their own houses. Many village houses (14) owned by families who live in urban areas, who use them_ (15) summer and weekend retreats, or for retired parents.
Most families in (16) areas do not have more than two children, while families in (17) areas tend to be larger. Grandparents play an important role in (18) care, particularly in urban areas, where most women work outside the (19) . Men of the younger generation have begun to help with household (20) , once considered only women’s responsibility.

读下列材料，回答问题。(16分)

材料1：南北美洲水资源开发利用状况比较表。

(1)水资源总量北美洲比南美洲________；水资源开发率北美洲比南美洲________。(2分)

(2)分析南、北美洲水资源开发利用结构特点并比较经济水平的差异。

(3)材料2所反映的我国水资源分布特点是___________________________

__________________________________________________________________。

(4)“南水北调”工程是解决我国水资源空间分布不均的重要举措，其中的“南”指________流域，“北”指________和________地区。

(5)京杭大运河是“南水北调”的重要通道之一。读下图，简述京杭大运河北京至长江段河底地势变化对“南水北调”的影响及需要采取的措施。