使机体对紫外线的敏感度降低的药物有（）A.磺胺 B.保太松 C.肾上腺皮质类固醇 D

下面对调节阀的作用过程说法正确的是（）。

A、信号压力→阀芯行程→阻力系数

B、信号压力→阻力系数→阀芯行程

C、阀芯行程→阻力系数→信号压力

D、阀芯行程→信号压力→阻力系数

To most of us, school means classes, teachers, schedules, grades, and tests. But for the children at Sudbury Valley School in Massachusetts, school is very different.

Firstly, there are no lessons. All the children, aged between 4 and 19, do whatever they want. There are no teachers, only “staff members (职员)”. The idea behind this is that you do not need to make children learn, because children want to learn anyway. “You do not need to say to a three-year-old. ‘Go explore your environment.’ You can’t stop them!” says Daniel Greenberg, a founder of the school. “But if you make children do what you want all day, they will lose all taste for learning.”

At Sudbury Valley School, you will allow children to talk, read, paint, cook, work on computers, study French, play the piano, climb trees, or just run around. Two boys spent three years just fishing!

The other way that Sudbury Valley School is different is that the children can decide the rules. Every week, there is a school meeting where both children and staff have one vote each — even the four-year-olds. They decide the school rules, how to spend the school budget（预算）, and even which staff they want and do not want any more.

When the school first opened in 1968, people said it would never work. But today, the school has 200 students, and 80% of its students go on to college. Even the two boys who went fishing all time have successful careers today. One of them is a musician and the other is a computer scientist.

小题1:What does the school believe?

A．Teachers cannot teach children well.

B．Children learn best when they do what they want to do.

C．Learning is for adults — children should only play.

D．Children should only learn about one thing at a time.小题2:What does Daniel Greenberg say about three-year-olds?

A．They love learning.

B．They are very naughty.

C．They want to be outside all the time.

D．They are too young to learn anything.小题3:What happens to the children after they leave this school?

A．They do the same things as children from other schools.

B．They have problems getting into college or getting a job.

C．They usually do very unusual jobs.

D．They are not successful in their business.小题4:What is the main topic of the article?

A．Children’s hobbies

B．Education in the US

C．A school without rules

D．An unusual school

可导致出现肺间质纤维化的结缔组织疾病有（）。

A.系统性红斑狼疮

B.结节性多动脉炎

C.Wegener坏死性肉芽肿

D.类风湿关节炎

E.系统性硬化症

在《淋证》篇中指出"最不可用补气之药，气得补愈胀，血得补愈涩，热得补愈盛。"是哪位医家的观点（）。

A.朱丹溪

B.张景岳

C.张从正

D.张仲景

E.以上都不是

通过载体的流体在一定流向上行驶路径的数量表现是指物流要素中的（）

A.流效

B.流程

C.流量

D.流速