下列哪种物质是血液制品和输液过程的主要污染物？（）A.内毒素 B.外毒素 C.血细胞

旅游法律行为的实质要件不包括（ ）。

A．行为人要合格

B．行为人的意思表示要自愿、真实

C．行为人必须以书面形式确定

D．行为人的内容要合法

后牙鸠尾峡的宽度一般为颊舌牙尖间距的()

A．1/4到1/3

B．1/3到1/2

C．1/5到1/4

D．1/2到2/3

E．2/3到3/4

医德规范（）

A.是医德实践中医德关系的客观反映

B.是医德评价的最高标准

C.是医德体系的主体结构

D.是指导医务人员医德行为的准则

E.是医德教育和医德修养的具体内容

阅读理解。

     The organization, Keep Time for Children, was started in 2002 to make people realize the importance of family time on weekends, particularly for families with school age children. __1__ We will try to help

parents take one day off on weekends to be with their family. __2__ What children want and need most

is to spend time with their parents, not with toys or taking part in activities. But with more and more people working on weekends, many children of school age don't see their parents anywhere near as often as they should. __3__ The movement is designed for families of all types and sizes under increasing pressure to

work on weekends. Because weekends are the very time when school age children are at home and in

need of their parents. We are going to put forward a Family Day Bill (议案) to the government. __4__ It

is aimed to solve the problems of increasing "shift (换班的) parenting" and of young children being left

"home alone" on weekends. __5__ If parents have a day off, they can spend a lot of time and energy with their children to share their happiness.

A. Keep Time for Children is now starting a movement.

B. The law is likely to make sure that parents take good care of their children.

C. Our aim is mainly to encourage parents to spend time with their children.

D. An American set up the organization.

E. It would give every parent of children under the age of 16 the right in law to a weekend day off each

week.

F. Our time is the most important thing that we can give our children.

G. Parents who do not share enough time with their children are to blame.

在长期用药的过程中，突然停药易引起心动过速，这种药最可能是

A．哌唑嗪

B．肼屈嗪

C．普萘洛尔

D．-甲基多巴

E．利血平