如图所示电路，电源内阻不可忽略。开关S闭合后，在变阻器R0的滑动片向下滑动的过程

猴子煮瓜

        猴子种的瓜果获得了大丰收。     

        这天，猴子捧着南瓜正要啃。     

        小松鼠在树上好心地说：“猴兄，南瓜煮熟了吃，又香又甜。”     

        猴子瞪了他一眼， “你别骗我上当了!”  

        小松鼠认真地说： “你不妨试试，我什么时候骗过你？”   

        猴子半信半疑，把南瓜煮熟后一尝，果然香甜可口，比生吃的味道好多了。他高兴地说：“虚心听别人的话没错！”     

        第二天，狐狸对猴子说：“猴老弟，你种的那些西瓜、甜瓜如果煮熟了吃，味道会更好！”    

        猴子不假思索，就开始煮西瓜。一会儿，西瓜煮成了一锅水。猴子又把甜瓜煮熟了，再一尝，烂乎乎的，难吃极了。     

        猴子这才知道自己上了狐狸的当，他自言自语地 说：“不信别人的话不对，轻信别人的话更容易受骗啊！”  

1．文中的小动物有                    、                    和                   。  

2．联系上下文理解词语意思。

     不假思索：                                                                                 

     自言自语：                                                                                   

3．用词语说句子。

     自言自语：                                                                                   

4．猴子先煮                      发现煮熟后                           ；他高兴地说：“                                  ！”  

     猴子听了狐狸的话，煮了              和              ，发现                            ，他明白了                                                         。

下列关于边际收益递减规律，表述正确的是（）。

A.边际收益递减规律也称生产要素平均产量递减规律

B.指在技术水平不变的条件下，若其他要素固定不变，而不断增加某种可变要素的投入，开始会使总产量递增

C.当要素增加到一定限度后，虽然总产量继续增加，但增加的产量逐渐递减

D.超过了一定界限继续增加可变要素的投入，将使总产量减少

E.可变生产要素投入增加所引起的产量（或收益）的变化可以分为边际产量递增、平均产量递减、总产量减少三个阶段

自我实现的需要是人的较低层次的需要。

商业银行开展个人理财业务中的违法违规行为，由银行业监督管理机构依据相应的法律法规予以处罚。 ( )

(46) It is known that the brain shrinks as the body ages, but the effects on mental ability are different from person to person. Interestingly, in a study of elderly men and women, those who had more education actually had more brain shrinkage.
"That may seem like bad news," said study author Dr. Edward Coffey, a professor of psychiatry and of neurology at Henry Ford Health System in Detroit. (47) However, he explained, the finding suggests that education allows people to withstand more brain tissue loss before their mental functioning begins to break down.
The study, published in the July issue of Neurology, is the first to provide biological evidence to support a concept called the "reserve" hypothesis, according to the researchers. In recent years, investigators have developed the idea that people who are more educated have greater cognitive reserves to draw upon as the brain ages; in essence, they have more brain tissue to spare.
(48) Examining brain scans of 320 healthy men and women aged 66 to 90, researchers found that for each year of education the subjects had, there was greater shrink age of the outer layer of the brain known as the cortex. Yet on tests of cognition and memory, all participants scored in the range indicating normal.
"Everyone has some degree of brain shrinkage," Coffey said. "People lose (on average) 2.5 percent per decade starting in adulthood."
There is, however, a "remarkable range "of shrinkage among people who show no signs of mental decline, Coffey noted. Overall health, he said, accounts for some differences in brain size. Alcohol or drug use, as well as medical conditions such as diabetes and high blood pressure, contribute to brain tissue loss throughout adulthood.
In the absence of such medical conditions, Coffey said, education level helps explain the range of brain shrinkage exhibited among the mentally-fit elderly. The more-educated can withstand greater loss.
(49) Coffey and colleagues gauged shrinkage of the cortex by measuring the cerebrospinal fluid surrounding the brain. The greater the amount of fluid, the greater the cortical shrinkage.
Controlling for the health factors that contribute to brain injury, the researchers found that education was related to the severity of brain shrinkage. For each year of education from first grade on, subjects had an average of 1.77 milliliters 11 more cerebrospinal fluid around the brain.
Just how education might affect brain cells is unknown. (50) In their report, the researchers speculated that in people with more education, certain brain structures deeper than the cortex may stay intact to compensate for cortical shrinkage.