在物理学发展史上，有一些定律或规律的发现，首先是通过推理论证建立理论，然后再由实验加以验证，下列叙述内容符合上述情况的是：（）
A.牛顿发现了万有引力，经过一段时间后卡文迪许用实验方法测出引力常量的数值，从而验证了万有引力定律
B.普朗克提出了量子理论，后来爱因斯坦用光电效应实验提出了光子说
C.麦克斯韦提出电磁场理论并预言电磁波的存在，后来由赫兹用实验证实了电磁波的存在
D.汤姆生提出原子的核式结构学说，后来由卢瑟福用α粒子散射实验给予了验证
参考答案：A, B, C
Choose the words or expressions and complete the passage（选择最恰当的单词或词语完成短文)（12分） The book that can’t wait One problem a lot of people have with books is that they buy them and then never start reading them. To 【1】, a foreign publisher called Eterna Cadencia came up with a very clever idea: it printed the words of the books in disappearing ink: the text of the book vanishes(消失) two months after the special package of the book is opened, so that encouraging buyers to start reading it 【2】 it goes away. They call this “the book that can’t wait.” According to a video presented with the story, the book was 【3】 . The publisher sold out the whole first edition(版) at a bookstore the day it was printed, and received “thousands of requests” for more copies of the book. It also got a lot of news reports. As a result, the publisher is planning to publish 【4】 kinds of books in disappearing ink. In some ways, the idea is pretty clever.【5】, we still have some suggestions: First, the book should start the vanishing process after the reader first opens the book. If the vanishing ink books become very popular in the future, readers will need to read them one at a time. They don’t want their books to vanish before they read the first page. Second, the vanished book should find a 【6】 use. Maybe they can be recycled, or maybe we can use them as notebooks. It would be a more environmentally friendly way to do this.
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