有关血液循环的说法,正确的是()。A.大循环先开始 B.大循环开始于右心室 C.小循

题型:单项选择题

问题:

有关血液循环的说法,正确的是()。

A.大循环先开始

B.大循环开始于右心室

C.小循环终止于右心房

D.小循环动脉内含有静脉血

考点:主管中药师人体解剖学人体解剖学题库
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I will never forget the year I was about twelve years old. My mother told us that we would not be (16) Christmas gifts because there was not enough money. I felt sad and thought, "What would I say when the other kids asked what I’ d (17) " Just when I started to (18) that there would not be a Christmas that year, three women (19) at our house with gifts for all of us. For me they brought a doll. I felt such a sense of (20) that I would no longer have to be embarrassed when I returned to school. I wasn’t (21) . Somebody had thought (22) of me to bring me a gift.

Years later, when I stood in the kitchen of my new house, thinking how I wanted to make my (23) Christmas there special and memorable, I (24) remembered the women’s visit. I decided that I wanted to create that same feeling of (25) for as many children as I could possibly reach.

So I (26) a plan and gathered forty people from my company to help. We gathered about 125 orphans (孤儿) at the Christmas party. For every child, we wrapped colorful packages filled with

toys, clothes, and school supplies, (27) with a child’ s name. We wanted all of them to know they were (28) Before I called out their names and handed them their gifts, I (29) them that they couldn’t open their presents (30) every child had come forward. Finally the (31) they had been waiting for came as I called out, "One, two, three. Open your presents!" As the children opened their packages, their faces beamed and their bright smiles (32) up the room. The (33) in the room was obvious, and (34) wasn’ t just about toys. It was a feeling, and the feeling I knew (35) that Christmas so long ago when the women came to visit. I wasn’t forgotten. Somebody thought of me. I matter.

18().

A. doubt

B. hope

C. suggest

D. accept

题型:单项选择题

Most people prefer to travel on ______train, because you can have a comfortable journey, but make sure you get ______fast one.

A.the ; the

B.a ; the

C.the ; a

D.不填;a

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正方形AP1P2P3的边长为4,点B,C分别是边P1P2,P2P3的中点,沿AB,BC,CA折成一个三棱锥P-ABC(使P1,P2,P3重合于P),则三棱锥P-ABC的外接球表面积为   (   )

A.24π

B.12π

C.8π

D.4π

题型:单项选择题

数据流图是描述数据在软件中流动和变换的过程,而对数据流图中所包含的元素的定义则是( )。

A) 数据存储
B) 数据加工
C) 数据字典
D) 数据定义

题型:单项选择题

在数据库表中,主索引和______要求字段值的唯一性,且不能在具有重复值的字段上建立该索引。

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