题目内容
不同种类的原子，其质量数一定都不相同。
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凡是核外电子数相同的粒子，都是同一种元素的原子。
以离子键结合的化合物一定是离子化合物，任何离子化合物中不可能含有共价键。
由非金属元素之间相互结合形成的化合物一定是共价化合物。
【填空题】[音频]As it turns out, the phrase “keeping up with the Joneses” 1) ________________ a cartoon strip of that name that 2) ________________ in 1913 and ran for 26 years. In the strip, creator “Pop” Momand poked fun at our need to do things in order to 3) ____other people. I’d love to say that need 4) ________________ when the last episode of that comic strip ran, but alas, it seems to have only gotten worse. These days we don’t care about the Joneses, we’re trying to keep up with the Kardashians. Which really gets to the 5) ________________ of the matter? Who is telling us that we need to keep up with the Kardashians? The media. Until the late 1880s, magazines were not 6) _____________. They were for the rich, who could afford both 7) _______________________________ to read them. But toward the end of the 19th century, two events happened that forever changed our world: second class mail 8) ________________________ and the rotary printing press was invented. This 9) _____________________ of magazines so that they were 10) ____________________ for the working class. Mass media was born. And this opened up a whole new world.
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