What is the 10-20-30 rule for slideshows from Guy Kawasaki of Apple?

According to the first paragraph, PowerShow.com is a website which______. A: offers advertising spaces B: provides training courses C: shares slideshows D: sells APPs

PowerShow.com is a leading presentation/slideshows(展示与放映幻灯)sharing website. Whether your application is business, how-to, education, medicine, school, sales, marketing, online training or just for fun, PowerShow.com is a great resource. And, best of all, most of its cool features are free and easy to use. You can use PowerShow.com to find and download sample PowerPoint presentations on just about any topic you can imagine, so you can learn how to improve your own slides and presentations for free. For a small fee you can get the industry's best online privacy(网络隐私)or publicly promote your presentations and slide shows with top rankings(排名).But aside from that, it's FREE. We'll even change your presentations and slide shows into the Flash, including 2D and 3D effects, music or other audio. All for free. Most of the presentations and slideshows on PowerShow.com are free to view: many are even free to download. Check out PowerShow.com today----for FREE. There is truly something for everyone! [br][/br] 41. Most of PowerShow.com's features are _______. A: convenient to develop B: expensive to buy C: difficult to log in D: easy to use

PowerShow.com is a leading presentation/slideshows(展示与放映幻灯片) sharing website. Whether your application is business, how-to, education, medicine, school, sales, marketing, online training or just for fun, PowerShow.com is a great resource. And, best of all, most of its cool features are free and easy to use.You can use PowerShow.com to find and download sample PowerPoint presentations on just about any topic you can imagine, so you can learn how to improve your own slides and presentations for free.For a small fee you can get the industry’s best online privacy(网络隐私) or publicly promote your presentations and slide shows with top rankings (排名). But aside from that, it’ s FREE. We’ll even change your presentations and slide shows into the Flash, including 2D and 3D effects, music or other audio. All for free. Most of the presentations and slideshows on PowerShow.com are free to view; many are even free to download. Check out PowerShow.com today — for FREE. There is truly something for everyone!1. According to the first paragraph, PowerShow.com is a website which A) offers advertising spaces B) provides training courses C) shares slideshows D) sells APPs2. Most of PowerShow.com’s features are . .A) convenient to develop B) expensive to buy C) difficult to log in D) easy to use3. By using PowerShow.com, you can learn to .A) make your presentations better B) create your personal website C) develop your own software D) conduct an online survey4. If you want to get the industry’ s best online privacy, you need to . A) sign a contract B) pay a small fee C) ask for permission D) register a new account5. Which of the following could be the title of the passage? A) Introduction to PowerShow Website B ) Developing Presentation Skills C) Setting up a Personal Website D) Future of PowerShow.com