一个物体做曲线运动，初速度为v1，经过时间t后速度变为v2，速度变化量△v=v2

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.

血氧容量减少，动脉血氧含量降低，动脉血氧饱和度正常，见于（）

A.失血性休克

B.乏氧性缺氧

C.静脉血掺杂

D.贫血性缺氧

E.循环性缺氧

血糖是下述哪个组织或器官的主要能源

A．心

B．肾

C．脑

D．脂肪

“虽然不言不语，叫人难忘记，那是你的眼神，明亮又美丽……”当年蔡琴在演唱这首《你的眼神》时，就曾以特有的韵味打动过无数听众，在今春“我是歌手”的电视节目上，林志炫以不同以往的方式翻唱此歌，诠释经典，再次让人如痴如醉。由此可见，文艺表演应该（）

①为人民大众所喜闻乐见

②倡导风格与形式的多样化

③立足于满足市场需求

④坚持继承和创新的统一

A.①②③

B.①③④

C.①②④

D.②③④

根据下表回答下面问题

2004年江山市的第二产业占GDP总量的比重为( )。

A．49.6%

B．48.5%

C．52.6%

D．45.3%