题干

在探究“根的什么部位生长最快”的实验中,各组同学获得的数据不同,为了得到接近反映真实情况的数据,应该(  )

A:以最大值作为测量结果

B:以这几组数据的平均值作为测量结果

C:以最小值作为测量结果

D:各组重新做实验,直至测量的数据一致

上一题 下一题 0.0难度 选择题 更新时间:2019-03-19 08:38:38

答案(点此获取答案解析)

B

同类题3

“一带一路”(丝绸之路经济带和21世纪海上丝绸之路)建设是新形势下我国对外开放的重大战略。阅读材料,完成下列问题。

材料一:

注:2012年-2016年中国外汇储备连续居世界首位;“一带一路”沿线多为发展中国家,资本是其发展的最大瓶颈。

材料二:“渝新欧”是重庆至欧洲的国际铁路联运大通道,联通中国、俄罗斯、哈萨克斯坦、白俄罗斯、波兰和德国六个国家,是“一带一路”南线的欧亚大陆桥。“渝”指重庆,“新”指新疆阿拉山口,“欧”指欧洲,合称“渝新欧”。“渝新欧”国际铁路大通道的货物,首站由重庆出发,沿连通关监管互认,信息共享,运输全程只需一次申报,一次查验,一次放行。
重庆是长江上游地区的经济、金融、商贸物流、科技创新和航运中心,处于陆上丝绸之路和海上丝绸之路的交汇点,是沟通中亚、南亚和东南亚的重要交通走廊。借“一带一路”建设之势,重庆迎来了新的发展机遇。《重庆市“十三五”规划纲要》指出,重庆要全面融入国家“一带一路”和长江经济带战略,依托“渝新欧”国际铁路大通道和长江黄金水道,充分发挥战略连接点的枢纽作用,增强在西部开发开放中的聚集辐射能力。推进开放型经济发展,大力发展服务贸易,加快贸易才式转型升级,加大“引进来”和“走出去”的力度,完善内外联动、互利共赢、安全高效的开放型经济体系。

同类题5

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Taking good notes is a time-saving skill that will help you to become a better student in several ways. ____ Second, your notes are excellent materials to refer to when you are studying for a test. Third, note-taking offers variety to your study time and helps you to hold your interest.

    You will want to take notes during classroom discussions and while reading a textbook or doing research for a report. ____ Whenever or however you take notes, keep in mind that note-taking is a selective process. ____

The following methods may work best for you.

●Read the text quickly to find the main facts and ideas in it.

●Carefully read the text and watch for words that can show main points and supporting facts.

●Write your notes in your own words.

____

●Note any questions or ideas you may have about what was said or written.

    As you take notes, you may want to use your own shorthand(速记). When you do, be sure that you understand your symbols and that you use them all the time. ____

A. Use words, not complete sentences.

B. There are three practical note-taking methods.

C. You must write your notes on separate paper.

D. Otherwise, you may not be able to read your notes later.

E. You will also want to develop your own method for taking notes.

F. That means you must first decide what is important enough to include in your notes.

G. First, the simple act of writing something down makes it easier for you to understand and remember it.