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专题一 阅读理解训练1 事实认定A If you are a traditional traveller who believes cameras are irreplaceable，here are some things you should pay attention to when looking for the perfect camera. Sensor size Along with the megapixel (百万像素) count image quality as well as the camera's performance in low light.It also determines whether the camera can electronically put the details it captures bigger enough to see—which is what makes the pictures not clear enough to see when you view the photos on a bigger screen. Portability ?The important thing is that the camera isn't too big or heavy，and that you have a good zoom (变焦距镜头) range for both wide－angle and telephoto shots (远距摄影照片) slim，light pocket camera with a high－qualified built－in optical zoom.“These are very popular for travel as they are lightZoom and shutter (快门) speedFor action or crowd shots，a fast shutter speed is a key factor.“When dealing with anything that's active—wildlife or people in action on the street—faces change within a tiny part of a second，” said Arnold，“a fast shutter speed is helpful in shooting the several hundred photos you might need to get that single winning shot.” 【语篇解读】 本文是一篇说明文介绍了旅行者在选择适合旅行的相机时应该注意的一些事情以及该类型相机的特点。 According to Atherton，what isn't a requirement for an ideal camera? | 
