乙型肝炎抗原抗体系统中唯一对乙型肝炎起有效保护作用的是A．HBsAg B．HBsAb

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.

据《素问•宣明五气》论五劳所伤之中，久视伤（）

A、气

B、肉

C、精

D、骨

E、血

去年暑假小明参加学校的生存夏令营，学到了许多野外生存的知识与技能。

（1）如何获得饮用水。如图所示，用大塑料袋套在一段树叶浓密的嫩枝上，袋口扎紧，随着植物中水的不断      和           ，经过一段时间，你就能获取可食用的水了；

（2）由于声音具有能量，为了防止触发雪崩，在攀登雪山时应禁止___________。

夏令营结束回来后活动小组又进行了一次“探究教室内的温度与那些因素有关”的活动。

（3）在活动中同学们提出了许多影响教室温度的因素，请你根据示例和自己的体会，至少写出三种影响教室内温度的因素。

（4）在所写因素中，请选出一种，试猜想它与教室内温度的关系。

［例］因素：教室内的人数。它与教室内温度的关系：教室内的人数越多，温度越高。

因素：                        

它与教室内温度的关系：                   。

（）的瓜葛上，结构决定功能。

关于清算中的公司的说法哪些是正确的（）

A、法人资格已经丧失

B、法人资格仍然存在

C、不能从事生产经营活动

D、清理公司财产并偿还债务

E、成立清算组取代公司董事会