题目

Reading is really a good way to improve ourselves. ____16____ If you don’t believe me, please consider these reasons to read more books. 1. You will optimize your brain power. ___17___ Unlike watching television, which requires no thought process, reading is an active learning experience that will keep your mind sharp（even in old age）. 2.___18___ If you’re looking for entertainment on a budget, you can’t beat books. Thanks to the popularity of electronic reading devices like the Kindle and re-selling websites like eBay, it’s never been easier to entertain yourself for hour4．下列物质露置于空气中，一段时间后总质量会增加且变质的是（　　）①浓硫酸②浓盐酸③氢氧化钠固体④氯化钠⑤石灰水⑥生石灰．A．③⑥B．①③⑥C．③⑤⑥D．①③⑤⑥