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问题 单项选择题 A型题

右束支和左前分支的供血主要来自（）。

A.左前降支

B.左回旋支的钝缘支

C.左回旋支的左室后支

D.右冠状动脉的窦房结支

E.右冠状动脉的后降支

答案

参考答案：A

解析：右束支和左前分支主要由左前降支的穿隔支供血。

单项选择题

下列腺瘤息肉中，哪一种最易发生癌变

A．管状腺癌

B．绒毛状腺瘤

C．幼年型息肉

D．炎性息肉

E．增生性息肉
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填空题

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.
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