为了提高液体温度计的灵敏度，下列对温度计结构的改进方法，哪种是最好的(      )

阅读暖希的《字为何变陌生了》一文，完成下列各题。

    ①现在，我们来做一个游戏：在这篇文章中随便找一个字，盯着这个字看30秒……有什么发现吗？是不是像我一样觉得你盯看看的那个字变得很奇怪，好像有点不认识了？熟悉的字怎么感觉那么陌生呢？

    ②是的，字没有什么变化，也不是写错了。事实是，不管什么字，通常你盯着看上二三十秒钟，就会觉得“这个字变陌生了”。研究还发现，左右结构的字更容易变陌生，譬如“日”“月”平均要过51秒钟变陌生，而如“明”“认”等字，则只要平均26秒左右就变陌生了。

    ③不仅仅是中国的方块字会让人产生这种奇怪的感觉，使用字母的外国人也发现他们有相同的问题。美国心理学杂志上曾有篇文章描述这一现象：如果对一个单词注视得太久，它就变得奇怪而陌生，可能看起来像是一堆毫无价值的符号。后来人们又发现，也不仅仅是文字会让人产生奇怪的陌生感，一幅熟人的照片、一个熟悉的地点，看久了之后都有可能会竟然觉得陌生起来。

    ④我们的神经系统有一个特点：如果短时间发生多次重复的刺激，就会引起神经活动的抑制。形象点说，神经活动也是会“疲倦”的。

    ⑤当我们盯着一个字看时，我们的大脑就得不断拿着这个字的模样去寻找它所表示的内客，找的次数越多，我们的神经系统就会越疲倦。于是我们大脑里辨认这个字所涉及的神经活动也会暂时被抑制，这时我们就会认不出这个宇了。这种现象被称为神经的“饱和反应”。

    ⑥我们不但在图象识别上可以产生饱和反应，我们的听觉、味觉、嗅觉等都会有饱和反应。不管什幺样的感觉刺激，只要时间一长，重复多了，带给我们的感觉就变了。

    ⑦这种饱和反应对我们其实是有好处的。我们的神经系统如果总是一直关注某个信息，就无法接受新的信息，因此，我们对旧信息的反应必须消减下去，或者产生变化，才能保证新的信息能够引起正确的反应。

（有删改）

阅读理解

B

    Some people like to collect stamps. Others prefer posters or coins. But Pinky Bhutia is different. She collects children. In her mountain village, in Sikkim, she is known as the wonderful young woman who adopts(领养) all the children she can.

    Pinky was 14 when she adopted her first child, a Nepali baby girl, whose patents passed away. Pinky's parents did not mind. Pinky left school and started working full time because she had a baby to feed. Today, she has twelve adopted children, and two sons from her marriage.

    Pinky is about 30 years old and she comes from a common family. If you passed her on the street, you wouldn't give her a second look. She lives in a brown mud-washed(泥刷的) house. There is a vegetable garden outside. Red hens with noisy chicks run all over the garden looking for food.

    If you ask her why she provides a home to so many kids, she smiles shyly. But her eyes are serious. “I know what it is to be poor and hungry.” As a child, her only dream was to eat a full meal, and her favorite amusement was watching people with shoes and imagining what it felt like. By adopting poor and homeless children she is making sure that they never feel that hopeless.

    Pinky feels very proud when she sees her children happy and bright, Her oldest baby, Aarita Rai, is now 20 years old, Then, there is  19-year-old Nimbe who came to Pinky because her mother was unable to look after her. She started to work in a government office two years ago. Ten-year-old Bhim and 14-year-old Kumar came to Pinky five years ago, after their father's death. They started living on a patch of land given by Pinky and grew vegetables for sale.

    “I like children. It's not one more mouth to feed but one more soul saved,” Pinky says.