题干

最近,从部委到地方都纷纷出台相应的政策措施以稳定物价,明确提出必要时对重要的生活必需品和生产资料实现价格临时干预措施。在国家一系列调控组合拳的作用下,蔬菜价格持续上涨的态势得到有效遏制。这体现的哲理有
①分析矛盾的特殊性,具体问题具体分析 ②人能在意识的指导下能动地改造世界
③发挥主观能动性与尊重客观规律相结合 ④事物的性质由矛盾的主要方面规定着

A:①②④

B:②③④

C:①③④

D:①②③

上一题 下一题 0.0难度 选择题 更新时间:2019-06-11 07:43:49

答案(点此获取答案解析)

D

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阅读理解

    Chokwe Selassie, aged 13, is working hard to help drivers avoid potholes(坑洼). The eighth-grader was inspired to kick off his creation on a recent morning, when his mother was driving him to school. Their car was damaged as it went over a huge pothole in the middle of the street in their hometown of Jackson, Mississippi. He decided to do something about the pothole problem in his city. His solution: an app that warns drivers when there is a pothole ahead.

    Chokwe developed the app with his friends Rodriguez Ratliff and Emmanuel Brooks. When the app detects a pothole, it is highlighted in red. And if you get close to the pothole, your phone will warn you. Drivers can also use the app to report any potholes they meet, and to look for other routes they can take to avoid roads that have them.

    The app relies on current available information about the streets of Jackson. It works by using the city's 311 call system, and uses information already stored in a database. Through the call system, citizens dial 311 to report non-emergency problems, which include potholes. Chokwe and his friends determined that focusing on the 10 busiest streets in Jackson would give them a large enough sample size to test the prototype(原型).

    Although the app isn't yet available for sale,Chokwe is already looking for ways to improve it. The prototype remains limited to 10 streets in Jackson, but he hopes to add more, so that it includes every street in the city. And then he wants to go even farther until it's nationwide.