题目

    Find Your Adventure at the Space and Aviation(航空) Center If you’re looking for a unique adventure, the Space and Aviation Center (SAC) is the place to be. The Center offers programs designed to challenge and inspire with hands-on tasks and lots of fun. More than 750,000 have graduated from SAC, with many seeking employment in engineering, aviation, education, medicine and a wide variety of other professions. They come to camp, wanting to know what it is like to be an astronaut or a pilot, and they leave with real-world applications for what they’re studying in the classro若0.000 201 7用科学记数法表示为2.017×10n，则n的值为        ( ▲ ) A.－3          B.－4              C.－5          D.－6