贯心脉而行气血的气是（）。 A.元气 B.宗气 C.营气 D.卫气 E.中气

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.

阅读下列关于秦筑长城的诗句，回答问题：    

唐·胡曾：“祖舜宗尧自太平，秦皇何事苦苍生。不知祸起萧墙内，虚筑防胡万里城。”   

唐·汪遵：“秦筑长城比铁牢，蕃戎不敢过临洮。虽然万里连云际，争得尧阶三丈高。”

清·杨鸾：“秦皇筑长城，乃为万世利。连山绝谷势蜿蜒，雄图自足制中外。”  

清·赵翼：“当其兴大役，天下皆痍疮。以之召祸乱，不旋踵灭亡。岂知易代后，功及万世长。”

说说诗人们是怎样评价秦筑长城这件事的？你认为谁的观点比较全面？

适用于打斜桩和拔桩的桩锤是( )。

A．落锤

B．单动气锤

C．双动气锤

D．柴油锤

超声诊断葡萄胎并发黄素囊肿，在水泡块排除后，囊肿还可持续存在几个月()

A．1个月

B．2～4个月

C．5～6个月

D．6个月以上

E．1个月以下

下面属于空位扩散活化能的是（）

A.热辐射能

B.形成能

C.间隙原子迁移能

D.杂质离子迁移能