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(加试题)根据材料,完成下列问题。

材料一:图1为我国陕西省地理事物示意图,图2为西安建成区面积和城镇人口变化曲线。

图1

图2

材料二:中华人民共和国成立初期,位于陕北的延安市森林覆盖率不足10%。20世纪90年代后开始大规模植树造林,森林覆盖率由1996年的16.3%猛增到2015年的46.35%,增速为全国第一。市内河流输沙总量也由1996年的268亿吨减少到2015年的1.93亿吨。

材料三:陕西省矿产资源十分丰富。目前该省矿产资源主要有露天开采和矿井采掘两种开发方式。

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    Are you using a dating App to make friends? How do you know that Ben from London is really 25-year-old? Is his photo taken recently? Is his name even Ben? Dating apps can be tricky to operate, particularly when you're trying to know whether someone is trustworthy, but one thing you can't cheat is your gene, which is why a new dating app is using DNA as a basis for its match.

    A dating app named Pheramor requires all users to hand in a cheek sample, from which a team of in-house scientists using a specially-created tool can queue the specific genes connected with attraction and then identify which users might be suitable. The process works by separating the 11 genes that link to our pheromones(信息素), the chemical signals that are believed to control one's attraction. Combining this data with the personal information allows the app to make very specific matches.

    “Pheramor uses both your biology and your social technology: we collect your genetic data through a cheek sample and collect your like, dislikes, and interest from your social media introductions like Facebook, Twitter, etc,” the app's website explains. “All of them will be used in our specific software, which is designed to learn what you prefer.”

    The co-founder Brittany Barreto, who has a PHD in genetics added that Pheramor's technology digs deeper than traditional dating apps, making it almost impossible for people to cheat their way to a date.

    The Houston-based app is already up and running but hopes to be officially put into market in February with 3,000 members.