言语发展的先天成熟理论的代表人物是（）。 A.斯金纳 B.班杜拉 C.皮亚杰 D.乔

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

下面是薛理和柯雪同学设计的“测食用油密度”的实验方案：

（1）薛理的方案：用调节平衡的天平测出空烧杯的质量m₁，向烧杯内倒入适量食用油，再测出烧杯和食用油的总质量m₂，然后把烧杯内的食用油全部倒入量筒内，读出量筒内食用油的体积为V₁；其测得的食用油密度的表达式是：ρ_油=______________

（2）柯雪同学的方案：在烧杯内倒入适量的食用油，用调节平衡的天平测出烧杯和食用油的总质量m₃，然后将烧杯内的适量食用油倒入量筒内，再测出烧杯和剩余食用油的总质量m₄（如图再读出量筒内食用油的体积V₂。其测得的食用油密度的表达式是： ρ_油=______________

（3）如图是按柯雪实验方案进行实验的情况，请将实验的数据及测量结果填入表中。

（4）薛理的实验方案中有什么缺陷？_____________________________。

对实验结果有什么影响？________________________________________。

桔梗皂苷祛痰作用的主要机制是（）

A.使痰液中黏多糖纤维断裂

B.抑制呼吸道分泌

C.兴奋呼吸中枢作用

D.抑制纤毛运动

E.刺激咽喉黏膜，反射性引起黏膜分泌增加，稀释痰液

接地线有什么作用？

关于人工流产术后宫腔积血，说法错误的是（）。

A.人工流产后子宫收缩不佳、极度后屈或宫颈内口狭小，致子宫出血积留宫腔

B.宫腔积血多发生于流产后2周

C.用宫颈扩张器扩张宫颈内口（必要时可扩张宫颈至6号），使宫腔积血流出

D.宫颈内口狭小常与人工流产强行扩张有关