下列哪一支血管不是右冠状动脉的分支A.右圆锥支  B.后降支  C.左回旋支  D.

简述儿童少年作息制度的基本原则。

目前，我国普通商品住宅个人住房抵押贷款额度的上限为所购住房价值的( )。

A．80%
B．60%
C．90%
D．70%

某天夜里，同宿舍的小赵.小钱、小孙、小李在谈论各自以及隔壁宿舍小周喜欢的电视频道。 小赵说:“我和小钱都喜欢看教育频道，小孙喜欢看艺术频道。” 小钱说:”我与小李都喜欢看财经频道，小孙喜欢看艺术频道。” 小孙说:“我与小赵都不喜欢看教育频道，小周喜欢看纪实频道。” 小李说:“小赵和小钱都喜欢看教育频道，我喜欢看新闻频道。” 若他们都只说对了两个人对电视频道的喜好，则小周喜欢的电视频道是（）

A.纪实频道 

B.教育频道 

C.新闻频道 

D.艺术频道

People are indulging in an illusion whenever they find themselves explaining at a cocktail(鸡尾酒 ) party, say, that they are "in computers," or " in telecommunications," or "in electronic funds transfer". The implication is that they are part of the high-tech world. Just between us, they usually aren’t. The researchers who made fundamental breakthroughs in those areas are in a high-tech business. The rest of us are (11) of their work. We use computers and other new technology components to develop our products or to organize our affairs. Because we go about this work in teams and projects and other tightly knit working group(紧密联系在一起的工作小组 ), we are mostly in the human communication business. Our successes stem from good human interactions by all participants in the effort, and our failures stem from poor human interactions.
The main reason we tend to focus on the (12) rather than the human side of work is not because it’s more (13) , but because it’s easier to do. Getting the new disk drive installed is positively trivial compared to figurine out why Horace is in a blue funk(恐惧)or why Susan is dissatisfied with the company aver only a few months. Human interactions are complicated and never very crisp(干脆的,干净利落的) and clean in their effects, but they matter more than any other aspect of the work.
If you find yourself concentrating on the (14) rather than the (15) , you’re like the vaudeville character(杂耍人物)who loses his Keys on a dark street and looks for them on the adjacent street because, as he explains, "The light is better there!\

A．technology

B．sociology

C．physiology

D．astronomy

血管外溶血常表现为（）

A.起病较缓慢

B.脾脏常肿大

C.部分病人切脾可有效

D.多有血红蛋白尿