[判断题]在850nm窗口，光纤即可以用于单模传输，又可以用于多模传输。(　　)
A.正确
B.错误

{{B}}The Power of Words: Advertising Tricks{{/B}}
The effect that words can have is incredible: to inform, persuade, hurt or ease pain, end war or start one killing thousands or even millions of people. They can get your point across, or destroy any hope of your ideas ever being understood. A major element of advertising is the words, which ones and in what order. The following is several of the specific tricks that are commonly used in advertising.
{{B}}Black/White Trick{{/B}}
The black/white, or either/or, trick is making a statement that provides insufficient options to your argument. "Love it or leave it" was a big slogan of the 1960s, and it sounds logical. Nevertheless, it provides no other possible options, such as" Love it, or don’t love it, stay or not, you don’t have to agree with me if you don’t want to. "
The reason this fallacy is often called the black/white fallacy is that it denies an